Peptides are short chains of amino acids — the same building blocks that make up proteins. Because of their small size, many peptides act as signaling molecules: they bind to receptors and tell cells to perform specific functions, such as releasing growth hormone or supporting tissue repair.
Peptide therapy uses specific, well-characterized peptides — prescribed by a physician and prepared by a licensed compounding pharmacy — to support goals like recovery, body composition, energy, and healthy aging. It is not a one-size-fits-all treatment: the right protocol depends on your health history, lab work, and goals.
How peptide therapy works
Your body already produces thousands of peptides naturally. Insulin, for example, is a peptide hormone. Therapeutic peptides are designed to interact with specific receptors or pathways — for example, stimulating the pituitary gland to release more of your own growth hormone, or supporting the signaling involved in tissue repair.
Because peptides are broken down into amino acids, they are generally well tolerated when properly prescribed and dosed. Most therapeutic peptides are administered by subcutaneous injection — a small, shallow injection similar to how insulin is given — though some are available in other forms.
Commonly prescribed peptides
Several peptides have a long history of clinical use and are frequently included in physician-supervised protocols:
- Sermorelin — a growth hormone-releasing hormone (GHRH) analog that may support natural growth hormone production.
- CJC-1295 / Ipamorelin — a peptide combination studied for its role in growth hormone signaling, recovery, and body composition.
- BPC-157 — a peptide studied for its potential role in tissue repair, joint wellness, and gut health.
- GHK-Cu — a copper peptide studied for collagen production, skin health, and hair support.
- PT-141 (Bremelanotide) — a peptide that acts on the central nervous system and is studied for sexual wellness.
What peptide therapy may support
Research on therapeutic peptides is ongoing, and individual results vary. Under physician supervision, peptide protocols are commonly used to support recovery from exercise and injury, lean muscle maintenance, sleep quality, energy, skin health, and sexual wellness. Your physician will discuss which peptides, if any, are appropriate for your situation based on your evaluation.
Is peptide therapy safe?
When prescribed by a licensed physician, sourced from a licensed U.S. compounding pharmacy, and monitored appropriately, peptide therapy has a favorable tolerability profile for most patients. Side effects are typically mild — such as temporary irritation at the injection site — but every therapy carries some risk, which is why medical screening and supervision matter.
It is important to distinguish physician-prescribed peptides from unregulated 'research chemical' products sold online. Products marketed for 'research use only' are not manufactured to pharmaceutical standards, are not dosed for human use, and carry significant quality and safety risks. Legitimate peptide therapy always involves a prescription and a licensed pharmacy.
How to get started
A legitimate peptide program starts with a medical evaluation: a health questionnaire, lab work where appropriate, and a consultation with a licensed physician. If peptide therapy is appropriate for you, your medication is compounded by a licensed pharmacy and shipped to your door with detailed instructions and ongoing clinical support.
Frequently asked questions
Explore your options with a physician
If this therapy sounds relevant to your goals, the next step is a clinical evaluation with a licensed physician.
Keep reading
This guide is for educational purposes only and does not constitute medical advice. Compounded medications are not FDA-approved and are prepared by licensed compounding pharmacies pursuant to a valid prescription. Always consult a licensed physician before starting any treatment.