Peptides for beginners

The short version

If you are new to peptides, a few names will keep coming up. These six pages take them one at a time, in plain words.

Each page answers the same questions: what the molecule is, whether it is an FDA-approved medicine, what a prescription route looks like, and what the research does and does not show.

These pages are a first look, not a recommendation. They do not tell you which one to try, they give no doses, and they cannot tell you how your body would respond. That takes a licensed clinician who knows your health.

What each first look covers

Every page follows the same plan, so you can compare them easily:

• What it is. How long the chain is, what it copies, and whether it is really a peptide at all.
• Its status. Whether an FDA-approved medicine exists, and where compounded versions stand today. Compounded means a pharmacy made it to order from a prescription. Compounded medicines are not FDA-approved.
• A prescription route. What a visit with a licensed clinician involves.
• The research. What has been studied, in whom, and where the gaps are.
• Known cautions. The side effects and warnings that are on record.

If a word is new to you, the glossary explains it in a line or two.

What these pages are not

They are not advice. A website cannot examine you, and it cannot know your other medicines or conditions.

This is a selection of six names, not a ranking or a recommendation.

They are not about research-only products. Some websites sell the same names in vials labelled "research use only". Those are sold for lab research, labelled not for human use, and no one reviews your health. What are peptides? explains why that label is a warning.

The six first looks

Semaglutide

A thirty-one amino acid peptide modelled on GLP-1, a gut hormone. It is the active ingredient in FDA-approved medicines, and compounded versions also exist. Read the semaglutide first look.

Tirzepatide

A thirty-nine amino acid peptide that acts on the receptors for two gut hormones, GIP and GLP-1. It is also the active ingredient in FDA-approved medicines. Read the tirzepatide first look.

BPC-157

A synthetic chain of fifteen amino acids. It is not an FDA-approved medicine. Read the BPC-157 first look.

GHK-Cu

Three amino acids holding a copper atom. It turns up in face creams as a cosmetic ingredient, and the rules change completely when the same molecule is meant for injection. Read the GHK-Cu first look.

NAD+

Often listed with peptides, but not one. It is a coenzyme, a helper molecule every cell uses to handle energy. Read the NAD+ first look.

Sermorelin

A twenty-nine amino acid copy of part of a brain hormone. It was once an approved medicine, but that product was discontinued. Read the sermorelin first look.

Before you read any of them

Two ideas will help with all six pages.

First, the same name can mean very different products. An FDA-approved medicine, a compounded medicine made by a licensed pharmacy, and a research-labelled vial can all carry the same molecule's name. Only the first has been reviewed by the FDA for a named use.

Second, legal status is described as the official source states it, on a stated date. Where the FDA has changed a page, these first looks say what the page says and when, rather than guessing what comes next.

Ready to ask a clinician?

Promise Peptides is a U.S. telehealth platform. Promise prescribes peptides now through licensed U.S. providers. A licensed U.S. provider reviews every request and your health history, then decides whether to prescribe. Not everyone qualifies, and the answer can be no. Prescribed medicines are prepared by licensed U.S. compounding pharmacies. Each pharmacy separately decides whether it can lawfully prepare a prescription; a prescription does not guarantee it will be filled. Compounded medicines are not FDA-approved. U.S. patients only. Availability varies by state and by treatment. Promise is LegitScript-certified. That certification is not FDA approval.

Visit Promise Peptides for energy

Neo may earn money when readers become Promise patients.

Sources

1. Compounding and the FDA: Questions and AnswersU.S. Food and Drug Administration
2. Drugs@FDA: FDA-Approved DrugsU.S. Food and Drug Administration
3. Certain Bulk Drug Substances for Use in Compounding that May Present Significant Safety RisksU.S. Food and Drug Administration
4. NLM Web PoliciesU.S. National Library of Medicine