{"entity":{"id":"rejuv-frontier-hormone-pellets","kind":"technology","name":"Compounded hormone pellets","aka":[],"tldr":"Pellets of compounded oestrogen and testosterone are implanted under the skin and sold as a way to feel young again. The National Academies reviewed the evidence and told prescribers to restrict their use: the claim that compounded preparations are safer or more effective than approved hormone products is not supported, and nobody checks what is in them.","summary":"Compounded bioidentical hormone therapy is prepared by a pharmacy to a prescriber's formula rather than manufactured to a marketing authorisation, and is often given as a subcutaneous pellet that releases hormone over months. It is marketed for energy, libido, mood, body composition and 'hormone optimisation', and survivors of cancer are a target market because treatment leaves many of them with abrupt menopause or hypogonadism.\n\nThe National Academies of Sciences, Engineering, and Medicine reviewed it in 2020 in The Clinical Utility of Compounded Bioidentical Hormone Therapy: A Review of Safety, Effectiveness, and Use. The committee concluded that use should be restricted to specific circumstances, found insufficient evidence for the marketing claim that compounded preparations are safer or more effective than approved products, and identified the absence of FDA review for safety, quality and effectiveness as a public health concern.\n\nTwo further points apply specifically after cancer. A pellet cannot be removed easily once implanted, so a dose that turns out to be wrong, or a hormone that turns out to be contraindicated, cannot simply be stopped. And for hormone receptor-positive breast cancer, prostate cancer and some gynaecological cancers, systemic hormone exposure is the thing the treatment was designed to remove; whether and how to replace it is a decision for the treating oncologist, with licensed products at known doses, not for a clinic selling pellets. Licensed hormone products exist and have dose-controlled evidence behind them; this record is about the compounded pellet, not about licensed hormone replacement.","status":"emerging","asOf":"2026-10-02","wikipedia":"https://en.wikipedia.org/wiki/Bioidentical_hormone_replacement_therapy","links":[{"label":"National Academies of Sciences, Engineering, and Medicine, The Clinical Utility of Compounded Bioidentical Hormone Therapy: A Review of Safety, Effectiveness, and Use (2020)","url":"https://doi.org/10.17226/25791"}],"tags":["rejuvenation","survivorship","evidence:insufficient","unproven","hormones"],"related":[],"cancers":[],"sections":["rejuvenation","supportive-care"],"technologies":["alternative-medicine-instead-of-treatment","survivorship-care-plan"],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":["late-effects","quality-of-life"],"trials":[],"people":[],"bottlenecks":["b-survivorship"],"keyPapers":[],"journals":[],"dependsOn":[],"notes":[],"principle":"A fused pellet of crystalline hormone implanted in subcutaneous fat dissolves over three to six months, producing a long plateau that cannot be titrated or withdrawn. Serum levels from pellets are frequently supraphysiological, and there is no validated monitoring strategy for a compounded preparation of unverified content.","strengths":["Addresses a real problem: treatment-induced menopause and hypogonadism are common and under-treated"],"limitations":["National Academies found no evidence that compounded preparations are safer or more effective than approved products and recommended restricting use","Not reviewed by the FDA for safety, quality or effectiveness","A pellet cannot be withdrawn once implanted","Systemic hormone exposure is contraindicated or needs oncology input in hormone-sensitive cancers","Sold privately, often on a subscription model"]},"route":"/technologies/rejuv-frontier-hormone-pellets/","neighbours":{"section":[{"id":"rejuvenation","kind":"section","name":"Recovery & Rejuvenation","route":"/fronts/rejuvenation/"},{"id":"supportive-care","kind":"section","name":"Supportive Care & Survivorship","route":"/fronts/supportive-care/"}],"technology":[{"id":"alternative-medicine-instead-of-treatment","kind":"technology","name":"Alternative medicine used instead of standard treatment","route":"/technologies/alternative-medicine-instead-of-treatment/"},{"id":"survivorship-care-plan","kind":"technology","name":"Survivorship care and late-effects surveillance","route":"/technologies/survivorship-care-plan/"},{"id":"rejuv-frontier-what-works","kind":"technology","name":"What actually works after treatment","route":"/technologies/rejuv-frontier-what-works/"}],"term":[{"id":"late-effects","kind":"term","name":"Late effects and survivorship toxicity","route":"/terms/late-effects/"},{"id":"quality-of-life","kind":"term","name":"Quality of life","route":"/terms/quality-of-life/"}],"bottleneck":[{"id":"b-survivorship","kind":"bottleneck","name":"Survivorship and late effects are neglected","route":"/bottlenecks/b-survivorship/"}]}}