Hormone pellets are small implants, about the size of a grain of rice, placed under the skin, where they release hormone slowly over weeks to months. People are often drawn to them because there is no daily pill, gel or patch to remember.
They also involve trade offs, and several major medical organizations have published clear guidance on them. Both are worth knowing before you choose, along with a few questions to put to any provider who offers pellets.
This article is for education and is not medical advice. Talk with a licensed provider about your health. Talk to us
How do hormone pellets work?
A provider places the pellets under the skin in a short procedure. According to the National Academies of Sciences, Engineering, and Medicine, each pellet is designed to release hormone at a steady rate as it slowly dissolves, and the dose it delivers depends on its size and surface area. That makes pellets demanding to manufacture: small differences in size or in how evenly the hormone is mixed can change how much is released.
For men, testosterone pellets are usually placed every three to six months, according to Cleveland Clinic, and are typically implanted in sets of ten or more.
Are hormone pellets FDA approved?
Some are and many are not. The National Academies report that an FDA approved testosterone pellet for men exists, while pellets containing estrogen or progesterone exist only as compounded preparations, made by a pharmacy rather than an approved manufacturer.
Compounded drugs are not FDA approved, which means the FDA does not check their safety, effectiveness or quality before they reach patients. In 2020 the National Academies found that compounded pellets may be difficult to make well, have no required testing of how they are absorbed, and raise concerns about safety and effectiveness. It recommended that the FDA's advisory committee consider all compounded hormone pellets for its list of drugs that are difficult to compound.
What the medical societies say
The American College of Obstetricians and Gynecologists (ACOG) recommends FDA approved hormone therapy over compounded bioidentical hormones for menopause symptoms, and says compounded versions should not be prescribed routinely when FDA approved options exist.
The Menopause Society lists pellets among the nonstandard routes used by compounded therapy and names its concerns: little regulation, overdosing and underdosing, impurities and a lack of safety and effectiveness data. It suggests compounded therapy only when someone cannot tolerate an approved option, for example because of an allergy, or needs a dose that is not available.
"Bioidentical" is not the same as compounded. The Menopause Society notes that the word began as a marketing term, and that many FDA approved products already contain hormones identical to the body's own, in a range of doses.
None of this makes every pellet the wrong choice for every person. It does mean the choice deserves a clear conversation, and that an FDA approved option should be on the table.
Can hormone pellets be removed or adjusted?
This is the main practical difference. A pill, patch or gel can be stopped or changed from one day to the next. A pellet keeps releasing hormone until it dissolves.
Cleveland Clinic physicians describe pellet levels as unpredictable and hard to undo if they come out too high. A Cleveland Clinic guide for physicians on testosterone therapy in women advises avoiding pellets because of the potential for prolonged exposure and doses above the body's natural range. In the same clinic's podcast, a physician describes seeing women with testosterone levels in the male range after pellet treatment.
A pellet compared with daily options
| A pellet | A patch, gel or pill | |
|---|---|---|
| Changing the dose | Keeps releasing hormone until it dissolves | Can be stopped or changed from one day to the next |
| FDA approved options | A testosterone pellet for men. Estrogen and progesterone pellets are only compounded | Many FDA approved products, in a range of doses |
Questions to ask before you choose pellets
Whoever you see, these questions are fair to ask, and a good provider will welcome them:
- Is this product FDA approved, or compounded? If it is compounded, which licensed pharmacy makes it?
- Is there an FDA approved option, such as a patch, gel or pill, at a dose that would work for me?
- Which blood tests will you run before we start, and how will you check my levels afterward? The Menopause Society considers saliva and urine tests unreliable for guiding hormone doses.
- What happens if my levels come out higher than intended, given that the pellet cannot simply be stopped?
- How often will we review whether I should continue? ACOG recommends reviewing hormone therapy every year.
- For men: will this affect my fertility? Cleveland Clinic notes that testosterone therapy can lower sperm count and is not recommended for men who want to start a family.
When to get checked
If you are thinking about hormone therapy of any kind, start with a full evaluation: your symptoms, your health and family history, and blood tests. If you already have pellets and notice changes that worry you, contact the provider who placed them and ask for your levels to be checked.
To understand what may be behind your symptoms in the first place, see perimenopause symptoms nobody warns you about and signs of low testosterone men often miss.
