Peptide Therapy: A Beginner's
Guide for Men

Peptide therapy has become popular fast, and the online claims have moved faster than the evidence. Many men are unsure what peptides do, which ones have real research behind them, and why buying them from an online seller is risky.

At Revive Low T Clinic, our doctors currently prescribe two peptides: sermorelin and PT-141. This guide explains what peptides are, how those two work, and what is known about other peptides you may have read about.

What Are Peptides?

Peptides are short chains of amino acids, usually 2 to 50 linked together. They are small versions of proteins, and your body makes thousands of them. Many act as signals that tell specific cells what to do.

Insulin is a peptide most people have heard of. It is a 51-amino-acid chain that controls blood sugar. Peptide medicines work on the same idea: each one targets a specific receptor or pathway in the body.

Some peptides are FDA-approved drugs. Others are made by compounding pharmacies, one patient at a time, on a doctor's prescription. Compounded medicines are not FDA-approved, so the pharmacy and prescriber matter.

Peptides We Prescribe at Revive

Sermorelin

Sermorelin is a short version of growth hormone-releasing hormone (GHRH). It signals your pituitary gland to make and release more of your own growth hormone. Unlike injected HGH, it works with your body's normal feedback controls instead of overriding them.

The FDA approved sermorelin (Geref) in 1990 as a diagnostic test and in 1997 for children with growth hormone deficiency. Geref was later discontinued. Today compounding pharmacies make sermorelin, and adult use is off-label.

Sermorelin is a small injection under the skin, usually at bedtime, when your body naturally releases growth hormone. We check IGF-1 and other labs before you start, at about 6 weeks, and then about every 3 months. Read more in our sermorelin guide.

PT-141 (Bremelanotide)

PT-141 is FDA-approved, as Vyleesi, for premenopausal women with low sexual desire. Prescribing it for men is off-label. It acts on melanocortin receptors in the brain, which play a part in desire and arousal.

Viagra and Cialis work on blood flow instead. PT-141 may help men whose main problem is low desire, and it can be used with TRT. We follow the label limit: at most 1 dose in 24 hours and 8 doses a month.

The most common side effect is nausea, which is usually mild. Flushing and headache can also happen, and blood pressure can rise for a few hours after a dose. Read more in our PT-141 guide and our article on ED and low testosterone.

Other Peptides You May Have Read About

We do not prescribe the peptides below at this time. We include them because patients ask about them. Most of the research on them is in animals, and none of them is an FDA-approved drug.

BPC-157

BPC-157 is a 15-amino-acid peptide based on a protein in stomach juice. In animal studies it helped tendons, ligaments and muscle heal. Good human trials are lacking, so its benefits and long-term safety in people are unknown.

TB-500

TB-500 is a lab-made peptide based on thymosin beta-4, a protein your body uses in wound healing. Animal studies suggest it helps cells move to an injury and form new blood vessels. As with BPC-157, there is little research in people.

CJC-1295 and Ipamorelin

CJC-1295 is a lab-made GHRH analog, like sermorelin but longer-acting. Ipamorelin triggers growth hormone release through a different target, the ghrelin receptor. Neither is FDA-approved, and both have little research in people.

The two are often sold together online as a "stack." We do not prescribe them. For men who need growth hormone support, sermorelin is the option we use.

Epithalon

Epithalon (also spelled Epitalon) is a lab-made peptide based on an extract of the pineal gland. Early lab and animal studies looked at telomeres, the protective caps on chromosomes that shorten with age. Whether it slows aging in people is not known.

Who Might Be a Good Candidate?

Peptides are not one-size-fits-all. Your doctor looks at your goals, health history and labs before suggesting either one. These are the two situations where we most often discuss them:

• Growth hormone support — Men with poor sleep, slow recovery or changes in body composition, when history and labs point to low growth hormone signaling (sermorelin)
• Low desire — Men whose libido stays low even after testosterone is in a healthy range (PT-141)

Why Doctor Supervision Matters

This is the most important part of this article. Peptides are widely sold online by "research chemical" companies and by online clinics that prescribe without a real evaluation. That creates safety risks for several reasons.

First, quality. Products from unregulated sellers may be the wrong strength, contaminated, broken down, or a different compound than the label says. You are injecting it, so purity matters.

Second, dosing. The right dose depends on your health, your goals and your other medicines. A doctor can set a dose that fits you and adjust it based on how you respond.

Third, monitoring. Growth hormone-releasing peptides call for regular checks of IGF-1, blood sugar and other labs. Without labs, problems can go unnoticed.

Fourth, safety checks. Some peptides interact with medicines or are a poor fit for certain conditions. For example, growth hormone-releasing peptides need extra caution in men with a history of cancer, so your doctor reviews your full history first.

Peptides and TRT

At Revive, peptides add to testosterone treatment; they do not replace it. TRT treats the low testosterone itself. Sermorelin or PT-141 may help with a specific goal, such as sleep, recovery or desire, that testosterone alone has not fully fixed.

If you are interested, the first step is an evaluation with one of our doctors. We review your history, labs, goals and current treatment, then tell you whether a peptide fits. Every peptide plan is personal, monitored and adjusted as needed.