BHRT Pellets

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Bioidentical hormone replacement therapy (BHRT) pellets have a long history of successful use, dating back to the 1930s. Hormone replacement using pellet implants originated in Europe and was introduced to the United States in 1939 by Dr. Robert B. Greenblatt, a pioneer in endocrinology. Pellet implants were a popular hormone delivery method in the US until the 1970s, when many oral and topical commercial hormone products became available.

Bioidentical hormones used in BHRT are manmade hormones derived from plant estrogens that are chemically identical to those naturally produced by the human body. Commonly replicated hormones include estrogen, progesterone, and testosterone. These bioidentical hormones have the same chemical structure and functionality as endogenous hormones, unlike synthetic hormones, which differ chemically and functionally. The BHRT approach is individualized, precisely measuring a person’s hormone levels to determine which hormones are needed to correct imbalances.

Pellets are small, rice-sized implants placed subcutaneously. They gradually release a steady, low dose of hormone over three to six months, maintaining balanced blood hormone levels without peaks and troughs common with pills or creams. This steady release mimics natural hormone secretion and adapts to metabolic demand, making pellet therapy not only effective but convenient. Because pellets are placed under the skin, they avoid first-pass liver metabolism seen with oral hormones, improving efficiency and reducing side effects.

Overall, BHRT pellets offer a scientifically backed, time-tested, and personalized form of hormone replacement therapy that provides consistent symptom relief for hormonal imbalances seen in menopause, low testosterone, and other conditions related to hormone deficiency. This therapy has been honed over nearly a century and remains a trusted option with advantages such as tailored dosing, convenience, and physiological hormone delivery.

Benefits of Bioidentical Hormone Replacement Therapy

Over 70 years of research has illustrated the benefits of pellet implants in administering hormones in both women and men.
Derived from plant sources that are chemically identical to those the human body produces.
Delivery of consistent, physiologic levels of hormones (shown to maintain and improve bone density).
They bypass the liver and don’t negatively impact clotting factors, blood pressure, lipid levels, glucose, or liver function.

Who benefits from this treatment?

Women and men who wish to supplement their hormones but do not want synthetic hormones.
Women and men who do not want the risk profile associated with synthetic hormones

Our BHRT Implant Procedure

Fused pellet implants are compounded using biologically identical hormones (most often Estradiol or Testosterone). The hormones are pressed / fused into very small cylinders, a little larger than a grain of rice.

Where are the pellets implanted and what care should I take afterwards?

Pellet insertion is a relatively simple in-office procedure done under local anesthesia. The pellets are inserted subcutaneously (under the fatty lining of skin), either in the lower abdomen or the upper buttocks through a very small incision. The incision is then closed with Steri-Strips. Implants placed under the skin consistently release small, physiologic doses of hormones, which have been shown to have many benefits.

After Implantation

Vigorous activity should be avoided for 7-10 days, especially activity involving the gluteus muscles. You may shower the same day as the procedure, but submerging in water (swimming or bathing in a bathtub) should be avoided for a week, or until the incision site has healed.

How long do BHRT implants last?

Fused Pellet Implants typically last between 3-5 months, depending on how rapidly the hormones are metabolized. Some patients begin to feel symptom relief within 48 hours, while others may take up to two weeks to notice a marked difference. The pellets do not need to be removed. They are completely absorbed by the body.

How do I know which hormones I need?

Before starting any hormone replacement therapy, patients should work directly with a knowledgeable healthcare practitioner to have hormone testing done to evaluate their personal hormone profile. Based on existing hormone levels and health history, the practitioner will make a hormone replacement recommendation. Once pellets have been inserted, hormone levels will be reevaluated prior to the insertion of the next round of pellets. Follow up lab work is done after the initial pelleting to determine whether target hormone levels were reached. Once this is successfully achieved, the practitioner may suggest testing less frequently based upon patient feedback and prior hormone levels.

A Deeper Dive into Bioidentical Hormone Replacement:

From the U.S. National Institutes of Health:

Bio-identical hormone replacement therapy (BHRT or BHT) uses bio-identical hormones (BHs), which are derivatives of plant extracts chemically modified to be structurally indistinguishable from human endogenous hormones.

BHTs are compounded into different doses so they can be customized to a patient’s specific needs and are available via different routes of administration.

Typically, compounded preparations of BHs may include estriol, estrone, estradiol, testosterone, micronized progesterone, and occasionally dehydroepiandrosterone (DHEA).

It is generally accepted that estrogen-based hormone therapies share similar efficacies as well as risks. Many FDA-approved and regulated pharmaceutically-manufactured and branded conventional hormone therapies (CHTs) employ bio-identical hormones.

Since the publication of the Women’s Health Initiative (WHI) trial reporting an increased risk of stroke, venous thrombosis, and breast cancer with conventional hormone therapies, the use of CHT has declined, and there has been increased interest in alternative bio-identical approaches.

The Bioidentical Hormone Debate
Are bio-identical hormones (estradiol, estriol, and progesterone) safer or more efficacious than commonly used synthetic versions in hormone replacement therapy?

Holtorf K. Holtorf Medical Group, Inc., Torrance, CA 90505

BACKGROUND: The use of bio-identical hormones, including progesterone, estradiol, and estriol, in hormone replacement therapy (BHRT) has sparked intense debate. Of special concern is their relative safety compared with traditional synthetic and animal-derived versions, such as conjugated equine estrogens (CEE), medroxyprogesterone acetate (MPA), and other synthetic progestins. Proponents for bio-identical hormones claim that they are safer than comparable synthetic and nonhuman versions of HRT. Yet according to the US Food and Drug Administration and The Endocrine Society, there is little or no evidence to support claims that bioidentical hormones are safer or more effective.

OBJECTIVE: This paper aimed to evaluate the evidence comparing bio-identical hormones, including progesterone, estradiol, and estriol, with the commonly used non-bio-identical versions of BHRT for clinical efficacy, physiologic actions on breast tissue, and risks for breast cancer and cardiovascular disease.

METHODS: Published papers were identified from PubMed/MEDLINE, Google Scholar, and Cochrane databases, which included keywords associated with bio-identical hormones, synthetic hormones, and HRT. Papers that compared the effects of bio-identical and synthetic hormones, including clinical outcomes and in vitro results, were selected.

RESULTS: Patients report greater satisfaction with HRTs that contain progesterone compared with those that contain a synthetic progestin. Bio-identical hormones have some distinctly different, potentially opposite, physiological effects compared with their synthetic counterparts, which have different chemical structures.

Both physiological and clinical data have indicated that progesterone is associated with a diminished risk for breast cancer, compared with the increased risk associated with synthetic progestins.

Estriol has some unique physiological effects, which differentiate it from estradiol, estrone, and CEE. Estriol would be expected to carry less risk for breast cancer, although no randomized controlled trials have been documented.

Synthetic progestins have a variety of negative cardiovascular effects, which may be avoided with progesterone.

CONCLUSION: Physiological data and clinical outcomes demonstrate that bioidentical hormones are associated with lower risks, including the risk of breast cancer and cardiovascular disease, and are more efficacious than their synthetic and animal-derived counterparts.

Until evidence is found to the contrary, bio-identical hormones remain the preferred method of HRT.

Postgrad Med. 2009 Jan;121(1):73-85.

Experimental Benefits of Sex Hormones on Vascular Function & the Outcome of Hormone Therapy in Cardiovascular Disease
Ross RL, Serock MR, Khalil RA. Division of Vascular Surgery, Brigham and Women’s Hospital, and Harvard Medical School, Boston, Massachusetts 02115.

Abstract: Cardiovascular disease (CVD) is more common in men and post-menopausal women than pre-menopausal women, suggesting vascular benefits of female sex hormones.

Experimental data have shown beneficial vascular effects of estrogen including stimulation of endothelium-dependent nitric oxide, prostacyclin, and hyperpolarizing factor-mediated vascular relaxation. However, the experimental evidence did not translate into vascular benefits of hormone replacement therapy (HRT) in postmenopausal women, and HERS, HERS-II, and WHI clinical trials demonstrated adverse cardiovascular events with HRT.

The lack of vascular benefits of HRT could be related to the hormone used, the vascular estrogen receptor (ER), and the subject’s age and preexisting cardiovascular condition.

Natural and phytoestrogens in small doses may be more beneficial than synthetic estrogen.

Specific estrogen receptor modulators (SERMs) could maximize the vascular benefits, with little side effects on breast cancer. Transdermal estrogens avoid the first-pass liver metabolism associated with the oral route.

Postmenopausal decrease and genetic polymorphism in vascular ER and post-receptor signaling mechanisms could also modify the effects of HRT. Variants of cytosolic/nuclear ER mediate transcriptional genomic effects that stimulate endothelial cell growth, but inhibit vascular smooth muscle (VSM) proliferation.

Also, plasma membrane ERs trigger not only non-genomic stimulation of endothelium-dependent vascular relaxation, but also inhibition of i, protein kinase C, and Rho kinase-dependent VSM contraction.

HRT could also be more effective in the peri-menopausal period than in older post-menopausal women, and may prevent the development, while worsening preexisting CVD.

Lastly, progesterone may modify the vascular effects of estrogen, and modulators of estrogen/testosterone ratio could provide alternative HRT combinations. Thus, the type, dose, route of administration and the timing/duration of HRT should be customized depending on the subject’s age and preexisting cardiovascular condition, and thereby make it possible to translate the the beneficial vascular effects of sex hormones to the outcome of HRT in post-menopausal CVD.

What are BHRT Pellets?

BHRT pellets are small, rice-sized implants containing bioidentical hormones, which are compounds chemically identical to those naturally produced by the body. They are used in bioidentical hormone replacement therapy (BHRT) to address hormone imbalances in men and women, particularly for symptoms related to menopause or low testosterone


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Who is a good candidate for BHRT Pellets?

A good candidate for BHRT pellets is typically someone experiencing symptoms of hormonal imbalance, such as menopause-related issues, low testosterone, unexplained fatigue, mood changes, or decreased libido. These pellets are suitable for both women and men who have been medically evaluated and found to have low or imbalanced hormone levels through blood tests.


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What does a typical BHRT Pellets session involve, and is there downtime?

A typical BHRT pellets session is a straightforward, in-office procedure and involves minimal downtime for most patients.​

What Does the Session Involve?  

The provider cleans and sterilizes the area for insertion—most commonly the upper buttocks or hip region.​
A local anesthetic is used to numb the skin, ensuring the process is virtually painless.​
A small incision, typically 5–10 mm, is made. Using a special medical device called a trocar, the provider places the pellet(s) under the skin in the fatty tissue.​
The incision is closed with Steri-Strips or surgical tape, and a protective bandage is applied.​
The whole process usually takes about 10–15 minutes.​

Patients receive post-insertion instructions and schedule follow-up blood testing in several weeks to monitor hormone levels.​

Downtime & Recovery:  

Downtime is minimal; most people can return to everyday activities immediately.​
It’s recommended to avoid strenuous lower body exercise, heavy lifting, soaking in baths, swimming, or hot tubs for 7-10 days, depending on provider instructions and whether you are male or female.
Some mild bruising, swelling, or discomfort around the site is normal, but resolves in a few days.
Normal showering is permitted, but the site should be kept dry otherwise until the dressing is removed.​


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How many BHRT Pellet sessions will I need and when will I see results?

Most people need BHRT pellet sessions two to four times per year, with each pellet implant lasting between three and six months depending on individual factors like gender, weight, metabolism, and specific hormone needs. Women generally require new pellets every three to four months, while men may need them every four to six months.​

Timeline for Results:

Many patients start to notice improvements such as increased energy, better mood, and symptom relief within a few weeks of their first pellet insertion.​

Full benefits usually appear after about three months, once hormone levels stabilize.​

The time to see results varies based on personal metabolism, the severity of symptoms, and hormone dosing.​

Monitoring and Adjustments:

Providers recommend regular follow-up appointments and bloodwork to track progress and assess if the dosing is optimal.​

It can take one or two insertion cycles to achieve the best symptom relief, as therapy is customized over time.​


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Are there side effects or reasons BHRT Pellets might not be right for me?

BHRT pellets can be life-changing for many patients but are not a one-size-fits-all solution.  Common side effects include pain, swelling, bruising, or infection at the insertion site, usually resolving quickly.  Hormone fluctuations may cause headaches, mood swings, breast tenderness, acne, increased facial oiliness, and irritability as the body adjusts to new levels.  Because pellets release hormones steadily over months and cannot be adjusted once inserted, treatment typically starts conservatively with dose fine-tuning over time.

BHRT pellets might not be right for you if you have hormone-sensitive cancers, blood clotting disorders, severe liver disease, untreated thyroid or adrenal conditions, or if you are pregnant or breastfeeding.


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