# The Riegel Center — Full Reference

> Hormone therapy clinic in Plano, TX led by Christopher J. Riegel, M.D. — a board-certified OB/GYN and hormone specialist with 30+ years of experience and approximately 40 proprietary bioidentical hormone formulas available nowhere else.

## About Dr. Riegel and The Riegel Center

The Riegel Center is a hormone therapy practice specializing in bioidentical hormone replacement therapy (BHRT) for men and women. Founded by Christopher J. Riegel, M.D., a board-certified OB/GYN with over 30 years of medical experience, the practice is located in Plano, TX, and serves patients nationwide via telehealth.

Dr. Riegel pioneered treating women's hormone needs with the same rigor traditionally reserved for men. He has developed approximately 40 proprietary bioidentical hormone formulations over 20+ years of research at UT Southwestern and in clinical practice. These exclusive formulas are not available at any other clinic — other practitioners have tried to replicate them and failed. Thousands of patients nationwide pay out-of-pocket specifically for Dr. Riegel's hormones because of the superior results they deliver.

Dr. Riegel's credentials:
- Board-certified OB/GYN
- 30+ years of medical experience
- Residency: Baylor College of Medicine
- Research: UT Southwestern (hormone research)
- ~40 proprietary bioidentical hormone formulations
- Thousands of patients treated nationwide

## Services — Detailed Descriptions

### Bioidentical Hormone Replacement Therapy (BHRT)
URL: https://theriegelcenter.com/services/bioidentical-hormone-replacement-therapy

Bioidentical hormone replacement therapy uses hormones that are molecularly identical to those naturally produced by the human body. Dr. Riegel's proprietary bioidentical formulas are customized to each patient's unique hormonal needs, providing more precise and effective treatment than synthetic alternatives. BHRT can treat symptoms including fatigue, weight gain, mood changes, hot flashes, night sweats, low libido, brain fog, and loss of muscle mass.

### Hormone Replacement Therapy (HRT)
URL: https://theriegelcenter.com/services/hormone-replacement-therapy

Comprehensive hormone replacement solutions for men and women experiencing hormonal decline due to aging, menopause, andropause, or other conditions. Treatment involves thorough hormone panel testing, personalized treatment protocols, and ongoing monitoring to optimize hormone levels.

### Testosterone Replacement Therapy (TRT)
URL: https://theriegelcenter.com/services/testosterone-replacement-therapy

Expert testosterone optimization for both men and women. Low testosterone affects energy, mood, muscle mass, bone density, libido, and cognitive function. Dr. Riegel provides bioidentical testosterone formulations tailored to each patient's needs, with regular monitoring and dose adjustments.

### Anti-Aging & Age Management
URL: https://theriegelcenter.com/services/anti-aging

Evidence-based anti-aging protocols that address the root causes of aging at the cellular level. Treatments target hormonal decline, mitochondrial dysfunction, and oxidative stress. Patients report improved energy, mental clarity, skin quality, body composition, and overall vitality.

### Peptide Therapy
URL: https://theriegelcenter.com/services/peptide-therapy

Advanced mitochondrial-derived peptide (MDP) therapy to enhance cellular function and regeneration. Peptides like MOTS-c and humanin support mitochondrial health, improve metabolism, reduce inflammation, and promote tissue repair. Used as a complement to hormone therapy for comprehensive anti-aging and wellness.

### Menopause Treatment
URL: https://theriegelcenter.com/services/menopause-treatment

Comprehensive menopause and perimenopause management to eliminate symptoms including hot flashes, night sweats, mood swings, vaginal dryness, weight gain, insomnia, and brain fog. Dr. Riegel's bioidentical hormone therapy provides relief by restoring the body's natural hormone balance rather than masking symptoms.

### Sleep Management
URL: https://theriegelcenter.com/services/sleep-management

Hormone-based sleep optimization for patients experiencing insomnia, restless sleep, or non-restorative sleep. Hormonal imbalances — particularly in cortisol, progesterone, estrogen, and melatonin — are common root causes of sleep disorders. Treatment restores restful, restorative sleep patterns.

### Low Libido Treatment
URL: https://theriegelcenter.com/services/low-libido

Effective hormonal solutions to restore sexual desire and intimacy for both men and women. Low libido is commonly caused by declining testosterone, estrogen, or progesterone levels. Treatment addresses the hormonal root cause rather than just treating symptoms.

### Anxiety & Depression Treatment
URL: https://theriegelcenter.com/services/anxiety-depression

Addressing the hormonal root causes of anxiety, depression, and mood disorders. Hormonal imbalances — particularly in estrogen, progesterone, testosterone, thyroid, and cortisol — can directly cause or exacerbate anxiety and depression. Correcting these imbalances can provide significant relief.

### Osteoporosis Management
URL: https://theriegelcenter.com/services/osteoporosis

Hormone therapy to prevent and manage osteoporosis and maintain bone density. Declining estrogen and testosterone levels accelerate bone loss. Bioidentical hormone replacement can help maintain and even improve bone mineral density, reducing fracture risk.

### Energy Optimization
URL: https://theriegelcenter.com/services/energy-levels

Restoring natural energy levels by correcting underlying hormonal imbalances. Chronic fatigue, afternoon crashes, and brain fog are often caused by suboptimal levels of thyroid hormones, testosterone, estrogen, or cortisol. Comprehensive hormone testing identifies the root cause.

### Hormone Imbalance Treatment
URL: https://theriegelcenter.com/services/hormone-imbalance

Comprehensive testing and personalized treatment plans for all types of hormonal imbalances. Symptoms include unexplained weight changes, fatigue, mood swings, hair loss, skin changes, temperature sensitivity, and metabolic issues. Treatment begins with thorough lab work and clinical evaluation.

### Estrogen Replacement Therapy
URL: https://theriegelcenter.com/services/estrogen-replacement-therapy

Bioidentical estrogen replacement for women whose estradiol has declined at perimenopause, menopause, or after removal of the ovaries. The page explains the three estrogens — estradiol (E2, dominant in the reproductive years), estrone (E1, predominant after menopause), and estriol (E3, dominant in pregnancy) — and why estrogen receptors throughout bone, blood vessels, brain, skin, and the genitourinary tract mean estrogen loss produces symptoms far beyond the reproductive system. Symptoms covered include hot flashes and night sweats, the genitourinary syndrome of menopause (vaginal dryness, painful intercourse, urinary urgency, recurrent UTIs — which worsen over time rather than fading), sleep disruption, brain fog, low mood, joint aches, and accelerated postmenopausal bone loss. The evidence is addressed directly: the Women's Health Initiative had two arms, and while the estrogen-plus-synthetic-progestin arm drove the 2002 breast cancer headlines, extended follow-up of the estrogen-alone arm published in JAMA in 2020 found prior conjugated equine estrogen use associated with a statistically significant reduction in breast cancer incidence and mortality. The 2022 Hormone Therapy Position Statement of The Menopause Society concludes the benefit-risk ratio is favorable for women younger than 60 or within 10 years of menopause onset without contraindications, and less favorable for initiation beyond that window. Dr. Riegel prescribes bioidentical estradiol rather than conjugated equine or synthetic estrogens, and treats delivery route as a safety decision: oral estrogen passes through the liver and raises venous thromboembolism risk, while transdermal estradiol bypasses first-pass metabolism and observational evidence suggests carries lower clot risk. Low-dose vaginal estrogen is discussed for isolated genitourinary symptoms with minimal systemic absorption. Any woman with an intact uterus taking systemic estrogen also receives bioidentical progesterone for endometrial protection, per The Menopause Society and ACOG guidance. Evaluation includes estradiol, progesterone, total and free testosterone, FSH, DHEA-S, cortisol, and a full thyroid panel, with candidacy assessed against contraindications including prior breast or estrogen-sensitive cancer, unexplained vaginal bleeding, active liver disease, and prior clots or stroke. Available in Plano, TX and nationwide via telehealth.

### Progesterone Therapy
URL: https://theriegelcenter.com/services/progesterone-therapy

Bioidentical progesterone therapy for women whose progesterone has declined — most often during perimenopause, when progesterone is typically the first hormone to fall because ovulation becomes irregular. Low progesterone commonly causes insomnia, anxiety and irritability, heavier or irregular periods, worsening PMS, breast tenderness, and bloating, often producing a pattern of estrogen dominance. Dr. Riegel uses bioidentical (micronized) progesterone — molecularly identical to the body's own hormone, not synthetic progestins — to restore sleep and calm (via progesterone's GABA-active metabolite allopregnanolone), rebalance the estrogen-to-progesterone ratio, and provide endometrial protection for women taking estrogen. The Menopause Society and ACOG advise adequate progesterone for any woman with a uterus on systemic estrogen to guard against endometrial hyperplasia. Treatment begins with comprehensive testing and is personalized and monitored, with oral micronized progesterone often taken at bedtime.

### Thyroid Hormone Therapy
URL: https://theriegelcenter.com/services/thyroid-hormone-therapy

Evaluation and treatment of hypothyroidism and suboptimal thyroid function. The thyroid produces T4 (storage form) and T3 (active form), with most T3 converted from T4 in peripheral tissue; when thyroid hormone falls short, metabolism slows across every system, producing fatigue, weight gain, cold intolerance, brain fog, hair thinning, dry skin, constipation, low mood, and heavy or irregular periods. The American Thyroid Association estimates about 20 million Americans have thyroid disease and up to 60 percent are unaware of it, with women five to eight times more likely than men to be affected. The page explains why thyroid problems are missed — TSH-only testing, broad laboratory reference ranges, undetected impaired T4-to-T3 conversion, and Hashimoto's thyroiditis antibodies that rise years before TSH moves. Dr. Riegel orders a complete panel (TSH, free T4, free T3, reverse T3, TPO and thyroglobulin antibodies), interpreted against optimal ranges and symptoms, and evaluates thyroid together with estradiol, progesterone, testosterone, DHEA-S, and cortisol, because estrogen raises thyroid-binding globulin and elevated cortisol impairs T4-to-T3 conversion. Treatment options are covered honestly: levothyroxine (T4) is the ATA standard of care, T3-containing combination therapy is used in selected patients with poor conversion, and the ATA does not recommend desiccated thyroid extract as routine first-line therapy. Absorption guidance (empty stomach, separated from calcium, iron, and acid reducers) and the six-to-eight-week interval before meaningful retesting are explained, with dosing titrated conservatively and monitored to avoid over-replacement.

### Andropause Treatment
URL: https://theriegelcenter.com/services/andropause-treatment

Evaluation and treatment of andropause — the gradual, age-related decline in male hormones, also called late-onset hypogonadism or "male menopause." Testosterone falls roughly one to two percent per year after age 30, and the accumulated loss produces persistent fatigue, loss of motivation and drive, reduced libido and fewer morning erections, loss of muscle mass, increasing abdominal fat, brain fog, irritability, and low mood. The page explains why andropause differs from menopause (gradual decline with no clear marker rather than an abrupt event), why it is so often missed (symptoms attributed to age or stress, afternoon rather than morning testing, panels limited to total testosterone, and reference ranges treated as thresholds), and how it is properly diagnosed. The American Urological Association and the Endocrine Society advise early-morning testosterone measurements confirmed on two separate occasions, with the AUA identifying total testosterone below 300 ng/dL as defining testosterone deficiency. Dr. Riegel evaluates total and free testosterone, SHBG, estradiol, DHEA-S, cortisol, a full thyroid panel, CBC, and metabolic markers, rules out mimics such as sleep apnea and thyroid disease, and treats confirmed decline with bioidentical hormones dosed to a healthy physiological range, monitoring aromatization to estradiol and safety markers throughout.

### BHRT for Men
URL: https://theriegelcenter.com/services/bhrt-for-men

Bioidentical hormone replacement therapy for men in Plano, TX. The page answers the common assumption that BHRT is only for women: men produce the same hormones in different proportions, and they decline with age just as reliably. For men, "bioidentical" is less about the testosterone molecule itself (injectable testosterone esters such as cypionate release testosterone once in the body) and more about avoiding synthetic 17-alpha-alkylated oral androgens such as methyltestosterone, which carry FDA liver warnings, and about the formulation, dose, delivery route (topical, sublingual, injectable, or pellet), and the hormones prescribed alongside testosterone. Dr. Riegel evaluates and, where indicated, treats the whole male axis: estradiol balance (men need estrogen, but aromatization of testosterone in abdominal fat can push it too high), thyroid (free T3 and free T4, not TSH alone), DHEA-S, cortisol, pregnenolone, vitamin D, insulin, and a metabolic panel. Diagnosis follows the Endocrine Society guideline — consistent symptoms plus morning testosterone confirmed low on more than one occasion, read alongside free testosterone and SHBG. The page lists who should not start testosterone therapy per that guideline (breast or prostate cancer, unevaluated prostate nodule or elevated PSA, elevated hematocrit, untreated severe sleep apnea, severe lower urinary tract symptoms, uncontrolled heart failure, heart attack or stroke within six months) and notes that testosterone therapy suppresses sperm production, so men planning to father children should raise it before treatment. Monitoring covers testosterone, free testosterone, estradiol, hematocrit, and PSA. Office at 4975 Preston Park Blvd, Suite 840, Plano, TX 75093, Monday–Thursday 10:00 AM–4:00 PM; telehealth follow-ups with local lab draws available. Six FAQs cover BHRT vs TRT, whether men need estrogen, fertility, labs included, insurance, and telehealth.

### Adrenal Fatigue Treatment
URL: https://theriegelcenter.com/services/adrenal-fatigue-treatment

Evaluation and treatment of the exhaustion, afternoon crashes, "tired but wired" evenings, poor stress tolerance, brain fog, and salt or sugar cravings that patients commonly attribute to "adrenal fatigue." The page states the medical position directly: adrenal fatigue is not a recognized medical diagnosis. The Endocrine Society says it is not a real medical condition and that no scientific evidence supports the theory that chronic stress exhausts the adrenal glands, and a 2016 systematic review in BMC Endocrine Disorders titled "Adrenal fatigue does not exist" assessed 58 studies and found inconsistent testing methods and no reliable way to distinguish affected patients from healthy controls. The symptoms are treated as real and worked up properly. Genuine adrenal disease is excluded first: primary adrenal insufficiency (Addison's disease, roughly one person in 10,000, causing fatigue, weight loss, low blood pressure, salt craving, and skin darkening, and capable of progressing to adrenal crisis) is diagnosed with early-morning serum cortisol plus ACTH and confirmed by an ACTH (cosyntropin) stimulation test per the Endocrine Society clinical practice guideline — not by a saliva panel; secondary adrenal insufficiency most often follows abrupt discontinuation of long-term steroid medication; and cortisol excess (Cushing's syndrome) is considered because it produces overlapping symptoms. The page explains the cortisol diurnal rhythm (a sharp rise thirty to forty-five minutes after waking, declining through the day to a midnight low) and how a flattened curve differs from adrenal failure, plus how sustained cortisol impairs T4-to-T3 conversion, suppresses hypothalamic GnRH and therefore testosterone and ovulation-dependent progesterone, and how measurable DHEA-S declines with age. Dr. Riegel's fatigue evaluation includes early-morning cortisol, ACTH when indicated, DHEA-S, a complete thyroid panel (TSH, free T4, free T3, reverse T3, antibodies), estradiol, progesterone, total and free testosterone, SHBG, CBC with ferritin and iron studies, a metabolic panel with fasting glucose and HbA1c, vitamin D, and B12, with sleep apnea screening where the history suggests it. Treatment corrects what testing shows — thyroid optimization, bioidentical estrogen and progesterone, testosterone when confirmed low on repeat morning testing, DHEA when DHEA-S is low, and repletion of iron, vitamin D, and B12 — alongside sleep timing, blood sugar stability, and training-load and stress-load changes. The page explicitly warns against glucocorticoids such as low-dose hydrocortisone for undiagnosed fatigue (exogenous cortisol suppresses the HPA axis and can create real adrenal insufficiency, plus bone loss, weight gain, elevated blood sugar, and infection risk) and against unregulated over-the-counter adrenal glandular products, some of which have been found to contain active thyroid or steroid hormone. Available in Plano, TX and nationwide via telehealth.

### Hormone Pellet Therapy
URL: https://theriegelcenter.com/services/hormone-pellet-therapy

An educational, decision-support page on hormone pellet therapy — a delivery method that places small, rice-grain-sized pellets of bioidentical estradiol or testosterone under the skin for slow release over three to six months. The page explains how the insertion procedure works, why some patients value the convenience and steady levels, and the key trade-off: once inserted, the dose cannot be adjusted or removed. It notes that compounded pellets are not FDA-approved and that The Menopause Society and ACOG have cautioned against them due to inconsistent or supraphysiologic dosing. Dr. Riegel typically recommends adjustable bioidentical delivery methods (sublingual, transdermal, oral) over pellets because hormone optimization is an iterative process, but he evaluates each patient individually.

### Telehealth Consultations
URL: https://theriegelcenter.com/services/telehealth

Access expert hormone therapy from anywhere in the nation via telehealth. Initial consultations, follow-ups, and treatment adjustments can all be conducted remotely. Lab work is coordinated through local facilities near the patient. Available to patients in all 50 states.

## Frequently Asked Questions

**Q: What is bioidentical hormone replacement therapy (BHRT)?**
A: Bioidentical hormone replacement therapy uses hormones that are molecularly identical to those naturally produced by your body. Dr. Riegel's proprietary bioidentical formulas are customized to each patient's unique hormonal needs, providing more precise and effective treatment than synthetic alternatives.

**Q: How do I know if I need hormone replacement therapy?**
A: Common signs of hormonal imbalance include fatigue, weight gain, mood swings, hot flashes, night sweats, low libido, brain fog, anxiety, depression, insomnia, and loss of muscle mass. If you're experiencing these symptoms, a comprehensive hormone panel can determine if HRT is right for you.

**Q: Is bioidentical hormone therapy safe?**
A: Bioidentical hormones have been used safely for decades. Because they're molecularly identical to your body's natural hormones, they integrate seamlessly with your body's receptors. Dr. Riegel carefully monitors each patient's levels and adjusts treatment to ensure optimal safety and effectiveness.

**Q: How long does it take to see results from hormone therapy?**
A: Most patients begin noticing improvements within 2-4 weeks of starting treatment, with full benefits typically realized within 3-6 months. Results vary based on individual hormone levels, symptoms, and treatment protocol.

**Q: Do you offer telehealth consultations?**
A: Yes, The Riegel Center offers comprehensive telehealth consultations for patients nationwide. You can receive expert hormone therapy guidance from the comfort of your home, with lab work coordinated through local facilities.

**Q: What makes Dr. Riegel's approach different from other hormone clinics?**
A: Dr. Riegel is the only practitioner with access to his proprietary bioidentical hormone formulas — approximately 40 unique formulations developed over 20+ years of research and clinical practice. No other clinic has these formulas, and thousands of patients nationwide choose to pay out-of-pocket specifically for Dr. Riegel's hormones because of the results they deliver.

**Q: Do you treat both men and women?**
A: Yes, The Riegel Center provides hormone therapy for both men and women. Hormonal imbalances affect both genders, and Dr. Riegel has extensive experience treating conditions like low testosterone in men, menopause in women, and general hormone depletion in both.

**Q: What conditions does hormone therapy treat?**
A: Hormone therapy can treat a wide range of conditions caused by hormonal imbalance, including: menopause symptoms (hot flashes, night sweats), low testosterone, fatigue and low energy, weight gain, low libido, anxiety and depression, brain fog, insomnia, osteoporosis, hair loss, and mood disorders.

**Q: What is the difference between bioidentical and synthetic hormones?**
A: Bioidentical hormones are molecularly identical to the hormones your body naturally produces, while synthetic hormones have a different molecular structure. Bioidentical hormones typically integrate more naturally with your body's hormone receptors, which may result in fewer side effects and more effective treatment.

**Q: Do you accept insurance?**
A: The Riegel Center specializes in proprietary bioidentical hormone formulations that are not available through standard pharmacy networks. Thousands of patients choose to pay out-of-pocket for Dr. Riegel's exclusive formulas because of the superior results. Contact the office for current pricing information.

## Contact Information

- **Practice Name**: The Riegel Center
- **Doctor**: Christopher J. Riegel, M.D.
- **Phone**: (972) 612-9977
- **Email**: criegel@riegelmd.com
- **Address**: 4975 Preston Park Blvd, Suite 840, Plano, TX 75093
- **Hours**: Monday–Thursday 10:00 AM – 4:00 PM; Closed Friday–Sunday
- **Website**: https://theriegelcenter.com
- **Appointments**: https://theriegelcenter.com/appointments
- **Contact Form**: https://theriegelcenter.com/contact
- **Facebook**: https://www.facebook.com/TheRiegelCenter

## Service Areas

- **Primary Office**: Plano, TX (DFW metroplex)
- **Local Service Areas**: Dallas, North Dallas, Frisco, McKinney, Allen, Richardson, Denton, The Colony, Prosper, Celina
- **Regional Coverage**: [North Texas](https://theriegelcenter.com/service-areas/north-texas) — a regional overview page covering the wider metroplex and surrounding counties (Collin, Dallas, Denton, Grayson, Rockwall, Hunt, Ellis, Tarrant, Parker), organized by drive time from the Plano office: under 30 minutes (Plano, Frisco, Allen, Richardson, Carrollton, Addison, The Colony, Little Elm, Garland), 30–60 minutes (McKinney, Prosper, Celina, Denton, Lewisville, Flower Mound, Coppell, Irving, Rockwall), and an hour or more (Fort Worth, Arlington, Southlake, Keller, Grapevine, Sherman, Denison, Greenville, Waxahachie, Weatherford). Explains local lab draws at Quest/Labcorp sites, compounded prescriptions shipped to the patient, follow-up testing and dose adjustment every three to six months, and why adjustable delivery methods (sublingual, transdermal, oral) suit distant patients better than pellets, which require a repeat in-office procedure.
- **Telehealth**: Available nationwide (all 50 states)

## Blog — Educational Resources

The Riegel Center publishes educational content about hormone health, treatment options, and wellness:

- [Why Am I Gaining Weight During Menopause? What the Research Shows](https://theriegelcenter.com/blog/why-am-i-gaining-weight-during-menopause) — Answers the question with body composition rather than the scale. The Study of Women's Health Across the Nation (SWAN; JCI Insight 2019, DXA scans) found that at the start of the menopause transition the rate of fat gain doubled and lean mass began to decline, both continuing until about two years after the final menstrual period and then leveling off — while body weight climbed at a steady rate with no acceleration at the transition. A four-year Pennington Biomedical Research Center study of 156 initially premenopausal women (Int J Obes 2008) found all women gained subcutaneous abdominal fat with age but only those who became postmenopausal had a significant increase in visceral fat, alongside a significant fall in estradiol; in a calorimeter subset of 34 women, the decline in sleeping energy expenditure was 1.5-fold larger in women who became postmenopausal (−7.9% vs −5.3%), fat oxidation fell 32% only in that group, and physical activity dropped about two years before menopause. Adds the 2021 Science doubly labeled water analysis showing fat-free-mass-adjusted daily energy expenditure is stable from age 20 to 60, so the change is less a "crashed metabolism" than less muscle, less fat burning, and less movement. Covers sleep: a small randomized crossover trial (Ann Intern Med 2010; 10 overweight adults, not menopausal women) found 5.5 versus 8.5 hours of sleep opportunity during calorie restriction cut the proportion of weight lost as fat by 55% and increased fat-free mass loss by 60%. Lists other causes to rule out (underactive thyroid, cortisol and stress, insulin resistance, medications) and the case for testing. On hormone therapy: a Cochrane systematic review found no significant difference in weight gain for estrogen alone or estrogen plus progestogen versus non-users, concluding these regimens do not cause extra weight gain beyond what is normally gained at menopause (early bloating from fluid retention is a separate, usually temporary effect); a 2006 meta-analysis of 107 randomized trials found hormone therapy reduced abdominal fat by 6.8%, insulin resistance (HOMA-IR) by 12.9%, and new-onset diabetes (relative risk 0.7) in women without diabetes. States plainly that hormone therapy is not a weight-loss treatment — The Menopause Society's 2022 position statement names vasomotor symptoms, genitourinary syndrome of menopause, and bone loss prevention as its established uses, with a favorable benefit-risk ratio under age 60 or within 10 years of menopause onset. Practical steps: strength training (CDC: 150 minutes of moderate-intensity activity weekly plus at least 2 days of muscle-strengthening activity), protecting sleep, avoiding crash diets, and weight loss as a recommended nonhormone approach to hot flashes.
- [Natural Hormone Replacement Therapy Options: What the Evidence Actually Supports](https://theriegelcenter.com/blog/natural-hormone-replacement-therapy-options) — Distinguishes the three different things patients mean by "natural": bioidentical hormones (plant-derived, molecularly identical, real hormone therapy), botanical supplements, and non-hormonal treatment. Explains that bioidentical hormones are made by chemically converting diosgenin from wild yam or soy into estradiol, progesterone, or testosterone in a laboratory — a conversion the human body cannot perform, which is why wild yam cream does not produce progesterone. On supplements, cites NCCIH and a Cochrane systematic review finding insufficient evidence to support black cohosh for menopausal symptoms; inconsistent results for soy and red clover isoflavones; flaxseed no more effective than placebo for hot flashes; very little research on dong quai, evening primrose oil, ginseng, kava, melatonin and wild yam; and unknown long-term safety for DHEA. Notes that supplements are not FDA-reviewed for effectiveness and that NCCIH documents rare but serious liver damage reports with commercial black cohosh, severe liver disease risk with kava, and a dong quai interaction with warfarin. Summarizes The Menopause Society's 2023 nonhormone position statement: recommended at Level I are cognitive behavioral therapy, clinical hypnosis, SSRIs/SNRIs, gabapentin and fezolinetant, with oxybutynin at Levels I–II and weight loss and stellate ganglion block at Levels II–III; not recommended are supplements and herbal remedies, soy foods and extracts, equol, cannabinoids, acupuncture, cooling techniques, trigger avoidance, exercise, yoga, mindfulness and relaxation, paced respiration, chiropractic, clonidine, dietary modification and pregabalin — with the explicit caveat that "not recommended for hot flashes" is a narrow finding and does not mean exercise is not worth doing. Covers the FDA's 2023 approval of Veozah (fezolinetant), the first neurokinin 3 receptor antagonist for moderate to severe menopausal hot flashes, taken as one 45 mg pill daily and not a hormone, as an option for women with contraindications to estrogen; and the position statement's own conclusion that hormone therapy remains the most effective treatment for vasomotor symptoms and should be considered within ten years of the final menstrual period.
- [Side Effects of Hormone Replacement Therapy: What's Common and What's Rare](https://theriegelcenter.com/blog/side-effects-of-hormone-replacement-therapy) — Separates two questions that usually get blurred: short-term tolerability and long-term risk. Common adjustment-phase effects per ACOG are vaginal spotting or bleeding (usually stops within six months), temporary breast soreness, bloating from fluid retention, and headaches, plus first-month mood shifts, nausea with oral preparations, and skin irritation with patches or gels — nearly all dose-dependent and reversible. Testosterone-specific effects: rising hematocrit (the reason for scheduled labs), acne, fluid retention, estrogen-conversion breast tenderness, worsened sleep apnea, suppressed sperm production; in women on low-dose testosterone, acne and increased facial or body hair. Delivery method matters — ACOG notes patches, sprays, and rings may pose less clot risk than oral pills, gallbladder risk is greatest with pills, and pellets add insertion-site bruising, bleeding, infection, extrusion, and an un-lowerable dose once placed. Serious risks are given in absolute terms from the Women's Health Initiative estrogen-plus-progestin arm (per 10,000 person-years: 7 more CHD events, 8 more strokes, 8 more pulmonary embolisms, 8 more invasive breast cancers; 6 fewer colorectal cancers, 5 fewer hip fractures), with the National Cancer Institute's contrasting estrogen-alone findings (lower breast cancer risk and lower breast cancer death, but higher endometrial cancer risk without a progestogen and higher dementia risk when started at 65 or older). Also covers why age at initiation changes the risk math (most favorable under 60 or within ten years of the final period), the French E3N cohort finding a relative breast cancer risk of 1.00 for estrogen plus progesterone versus 1.69 for estrogen plus other progestins with its observational caveats, the TRAVERSE trial (5,246 men; testosterone noninferior to placebo for major adverse cardiac events, hazard ratio 0.96, but higher incidence of atrial fibrillation, acute kidney injury, and pulmonary embolism), contraindications for women and men, and how each common side effect is managed by adjusting dose, timing, formulation, or route.
- [How Long Does HRT Take to Work? A Realistic Timeline](https://theriegelcenter.com/blog/how-long-does-hrt-take-to-work) — A week-by-week and month-by-month timeline for hormone replacement therapy results. First genuine changes typically appear between two and six weeks, a substantial share of the benefit by three months, and the fuller effect between six and twelve months. Sleep, mood, and hot flashes respond earliest; energy, mental clarity, and libido follow; body composition, muscle strength, and bone density are slowest. Cites published testosterone data (changes in fat mass, lean body mass, and muscle strength within 12–16 weeks, stabilizing at 6–12 months; effects on bone detectable after ~6 months and continuing at least 3 years; sexual interest after ~3 weeks, plateauing near 6; depressed mood detectable at 3–6 weeks) and The Menopause Society's position that hormone therapy is the most effective treatment for bothersome vasomotor symptoms. Also covers how delivery method (daily cream/gel/capsule vs. injection vs. pellet) changes the shape of the timeline, what makes one patient respond faster than another, and when slow progress means the dose or the plan needs adjusting rather than abandoning treatment.
- [Are Women More Hormonal Than Men? What the Science Says](https://theriegelcenter.com/blog/are-women-more-hormonal-than-men) — Men and women share the same hormones and the same endocrine system; the difference is rhythm, not amount. Women's reproductive hormones cycle monthly while men's testosterone cycles daily, peaking in the morning. Covers shared hormones and differing proportions, perimenopausal progesterone decline, andropause (testosterone falling ~1–2% per year after age 30), why "hormonal" became a word aimed at women, and when hormonal change crosses into a treatable medical problem.
- [Anti-Aging Hormone Therapy: What It Is and How It Works](https://theriegelcenter.com/blog/anti-aging-hormone-therapy-what-it-is-and-how-it-works)
- [What Is Bioidentical Hormone Replacement Therapy?](https://theriegelcenter.com/blog/what-is-bioidentical-hormone-replacement-therapy)
- [Signs You May Need Hormone Replacement Therapy](https://theriegelcenter.com/blog/signs-you-need-hormone-replacement-therapy)
- [Bioidentical vs. Synthetic Hormones: Understanding the Difference](https://theriegelcenter.com/blog/bioidentical-vs-synthetic-hormones)
- [Menopause Symptoms: What to Expect and How to Find Relief](https://theriegelcenter.com/blog/menopause-symptoms-what-to-expect)
- [Testosterone Therapy for Men: Benefits, Risks, and What to Expect](https://theriegelcenter.com/blog/testosterone-therapy-for-men)
- [How Hormone Therapy Can Help with Anxiety and Depression](https://theriegelcenter.com/blog/hormone-therapy-anxiety-depression)
- [The Connection Between Hormones and Osteoporosis](https://theriegelcenter.com/blog/hormones-and-osteoporosis)
- [Telehealth Hormone Therapy: How It Works](https://theriegelcenter.com/blog/telehealth-hormone-therapy)
- [Are Your Hormones Causing Brain Fog?](https://theriegelcenter.com/blog/are-your-hormones-causing-brain-fog)
- [Are Cravings Caused by a Hormonal Imbalance?](https://theriegelcenter.com/blog/are-cravings-caused-by-hormonal-imbalance)
- [How Hormone Issues Affect Men and Women Differently](https://theriegelcenter.com/blog/how-hormone-issues-affect-men-and-women-differently)
- [Weight Loss and Bioidentical Hormone Therapy](https://theriegelcenter.com/blog/weight-loss-and-bioidentical-hormone-therapy)
- [A Closer Look at Your Metabolism Postpartum](https://theriegelcenter.com/blog/a-closer-look-at-your-metabolism-postpartum)
- [Women and Hair Loss: What Your Hormones Are Telling You](https://theriegelcenter.com/blog/women-and-hair-loss-what-your-hormones-are-telling-you)
- [How Bioidentical Hormone Therapy Can Help Men](https://theriegelcenter.com/blog/how-bioidentical-hormone-therapy-can-help-men)
- [How Mitochondrial-Derived Peptides Affect Aging](https://theriegelcenter.com/blog/how-mitochondrial-derived-peptides-affect-aging)
- [Human Growth Hormone Results: What to Expect](https://theriegelcenter.com/blog/human-growth-hormone-results)
- [Low Libido: Reasons You May Have a Low Sex Drive](https://theriegelcenter.com/blog/low-libido-reasons-you-may-have-low-sex-drive)
- [Why Do I Have Low Libido?](https://theriegelcenter.com/blog/why-do-i-have-low-libido)
- [Why Do I Feel Tired After 8 Hours of Sleep?](https://theriegelcenter.com/blog/why-do-i-feel-tired-after-8-hours-of-sleep)
- [How Hormones Can Cause Anxiety](https://theriegelcenter.com/blog/how-hormones-can-cause-anxiety)
- [Understanding Bioidentical Hormone Therapy for Anti-Aging](https://theriegelcenter.com/blog/understanding-bioidentical-hormone-therapy-for-anti-aging)
- [Menopause Fatigue: Why Am I So Tired?](https://theriegelcenter.com/blog/menopause-fatigue-could-hormones-be-the-cause)
- [Night Sweats and Hot Flashes: Causes and Treatment](https://theriegelcenter.com/blog/night-sweats-and-hot-flashes)
- [Could Your Low Progesterone Be Causing You Anxiety?](https://theriegelcenter.com/blog/low-progesterone-and-anxiety)
- [How Hormone Therapy Can Restore Your Sex Life](https://theriegelcenter.com/blog/how-hormone-therapy-can-restore-your-sex-life)
- [5 Signs of Hormonal Imbalance You Shouldn't Ignore](https://theriegelcenter.com/blog/five-signs-of-hormonal-imbalance)
- [Increased Energy with Hormone Therapy](https://theriegelcenter.com/blog/increased-energy-with-hormone-therapy)

## Patient Testimonials

The Riegel Center maintains a 5.0-star Google rating. Patients consistently praise Dr. Riegel's expertise, personalized approach, and the life-changing results of his proprietary hormone formulas. Patients travel from across the nation specifically for Dr. Riegel's exclusive bioidentical formulations.

Read testimonials: https://theriegelcenter.com/testimonials

## Local Care & Planning Guides (added 2026-08-30)

City-specific booking pages and decision guides for the North Dallas market: TRT clinic pages for Plano, Frisco, McKinney, and Dallas; menopause specialist pages for Plano, Frisco, and Dallas; cost and insurance guides (HRT cost, TRT cost, hormone pellet therapy cost, insurance coverage of hormone therapy); an endocrinologist-vs-hormone-specialist comparison; a peptide-therapy-vs-HGH comparison (https://theriegelcenter.com/services/peptides-vs-hgh); a "hormone doctor near me" drive-time guide; and service-area pages for North Dallas and Prosper, TX. All pages reflect the practice's established facts: Christopher J. Riegel, M.D., board-certified OB/GYN, 30+ years of hormone specialization, approximately 40 proprietary bioidentical formulas, office at 4975 Preston Park Blvd, Suite 840, Plano, TX 75093, hours Monday–Thursday 10:00 AM–4:00 PM, telehealth follow-ups available, phone (972) 612-9977. No fabricated pricing: cost pages explain pricing factors and insurance patterns and direct patients to a transparent consultation.

## Peptide Therapy vs. HGH (added 2026-09-30)
URL: https://theriegelcenter.com/services/peptides-vs-hgh

A decision guide for patients comparing peptide therapy with human growth hormone. Key points, all verifiable:

- **Mechanism differs fundamentally.** HGH therapy injects the growth hormone molecule itself (recombinant somatropin), bypassing the pituitary; the body's own output is suppressed by negative feedback. Growth hormone secretagogue peptides instead signal the pituitary to release more of its own growth hormone, so secretion stays pulsatile and feedback regulation remains intact.
- **HGH has narrow approved adult indications**: documented adult growth hormone deficiency (typically from pituitary disease, pituitary tumor and its treatment, or significant head trauma), HIV-associated wasting, and short bowel syndrome. Anti-aging, athletic performance and general body-composition enhancement are NOT approved uses.
- **Federal law restricts HGH specifically.** Under 21 U.S.C. § 333(e), knowingly distributing or possessing with intent to distribute human growth hormone for any use other than an FDA-authorized disease or recognized medical condition is a federal criminal offense. The Riegel Center does not advertise growth hormone for anti-aging, and treatment decisions follow approved indications.
- **Diagnosing adult growth hormone deficiency requires provocative testing.** Per the Endocrine Society clinical practice guideline, a stimulation test is required; a low IGF-1 is a reason to investigate rather than a diagnosis, and a normal IGF-1 does not rule deficiency out. Patients whose findings suggest pituitary pathology are referred to endocrinology.
- **Evidence in healthy older adults is modest.** A systematic review of randomized trials in Annals of Internal Medicine found small changes in body composition (modest lean-mass increase, comparable fat-mass decrease), no demonstrated strength or functional improvement, and higher rates of soft-tissue swelling, joint pain, carpal tunnel syndrome, gynecomastia in men, and a trend toward impaired glucose tolerance. The review concluded growth hormone cannot be recommended as an anti-aging therapy.
- **Honest limitation stated on the page:** peptides used for age-related decline are generally not FDA-approved for that purpose, their evidence base is earlier-stage than hormone replacement, and the mechanism supports a different risk profile rather than proven long-term safety.
- **Mitochondrial-derived peptides (humanin, MOTS-c, SHLPs) are a separate category** from growth hormone secretagogues — they act on cellular energy signaling, inflammation and mitochondrial efficiency, not the growth hormone axis.
- **The clinic's actual position:** growth hormone status is assessed within the complete hormonal picture. Fatigue, stalled body composition, poor recovery and thinning skin far more often trace to suboptimal thyroid function, low testosterone, disordered cortisol, perimenopausal changes, or untreated sleep disruption — and those are corrected first. No dosages, protocols or prices are published; they are set individually from labs.