The dietary supplement lane looks like the obvious answer. No prescription, no approval, no pharmacy, no medical director — you can be selling by the end of the quarter. It is why so many peptide products appear in capsule form with a small-print disclaimer at the bottom of the page.
The lane exists. Most peptides simply are not admitted to it, and the reason is structural rather than a matter of enforcement priorities. If you are considering this route, this is the door you are standing in front of.
What a dietary supplement legally is
The Dietary Supplement Health and Education Act did not create a category of “things sold as supplements.” It created a category of products containing a dietary ingredient, defined as a vitamin, a mineral, an herb or other botanical, an amino acid, a dietary substance used to supplement the diet by increasing total dietary intake, or a concentrate, metabolite, constituent, extract or combination of those.
Read that list carefully. Amino acid is in it. A synthetic chain of amino acids assembled to a designed sequence to produce a pharmacological effect is not an amino acid, any more than a synthesised drug is a carbon atom.
The clause that closes the door
Even where an argument could be made, a second provision usually ends it. An article is excluded from the dietary supplement definition if it was approved as a new drug, or authorised for investigation as a new drug where substantial clinical investigations were instituted and made public, unless it was marketed as a food or supplement before that happened.
This is the drug exclusion clause, and it is aimed exactly at this manoeuvre: developing something as a drug and then, when the drug path proves long or unsuccessful, re-badging it as a supplement. The order of events decides it, and for compounds developed as drug candidates the order is rarely favourable.
And if you clear both, you still have to notify
An ingredient not marketed in the US before October 1994 is a new dietary ingredient, and the manufacturer or distributor must submit a notification to the FDA — with the evidence on which it bases the conclusion that the ingredient is reasonably expected to be safe — at least 75 days before marketing.
Very few peptide capsule products on the market have filed one. That is not a technicality. Marketing a new dietary ingredient without the required notification renders the product adulterated.
BPC-157 as the worked example
It is the compound most often sold in oral “supplement” form, so run it through the gates:
- Not an approved drug — it does not appear in the FDA’s approved drugs database.
- Not established as a lawful dietary ingredient, and no accepted NDI pathway has been completed for the oral products in circulation.
- Listed by the World Anti-Doping Agency under S0, non-approved substances.
- On the US Department of Defense’s prohibited dietary supplement ingredients list — which matters commercially if any part of your audience is serving military.
The regulatory position after the FDA’s 2026 Category 2 removals does not change any of this; that process concerns compounding, not supplements. See peptides and the bulks list.
The peptide supplements that are entirely legitimate
This is where the conversation usually gets unnecessarily binary. Collagen peptides are peptides. So are whey protein hydrolysates. They are sold lawfully at enormous scale, because they are food-derived protein hydrolysates consumed as nutrition — dietary substances in the ordinary sense — and because the claims made for them stay inside what a supplement may say.
The difference is not the word “peptide.” It is that one category is food protein broken into fragments and consumed as protein, and the other is a designed sequence intended to produce a specific pharmacological effect. The FDA’s interest tracks that distinction closely.
The claim ladder
Whatever lane you are in, your claims determine your category. This is the part worth printing out:
| Lane | What you may say | What converts it to a drug |
|---|---|---|
| Dietary supplement | Structure/function claims, substantiated, with the required disclaimer, notified to the FDA within 30 days of first marketing | Any claim to treat, prevent, mitigate or cure a disease |
| Cosmetic | Cleansing, beautifying, promoting attractiveness, altering appearance | Healing, repairing tissue, treating a condition, changing structure or function |
| Drug | Whatever the approved label supports | n/a — you are already there |
| Compounded preparation | Clinical communication with a patient’s prescriber; never advertised as FDA approved | Marketing it as a branded consumer product |
Note how narrow the cosmetic column is, and how much of the peptide marketing you have seen sits outside it.
The branded product path that actually exists
If what you want is your name on a box, sold direct, with no prescription, the honest route is topical cosmetics. Cosmetic peptides are an established ingredient class, and the category has real obligations since the Modernization of Cosmetics Regulation Act of 2022: facility registration, product and ingredient listing by a responsible person, listing within 120 days for new products, annual listing updates, biennial registration renewal, safety substantiation, adverse event reporting, and FDA recall authority. Small-business exemptions exist and do not cover everything.
It is a genuine compliance burden — which is what makes it a genuine business rather than a window. The trade-off is the claim ceiling in the table above, and that ceiling is the whole deal. A cosmetic brand that starts making repair and regeneration claims has quietly relaunched itself as an unapproved drug company.
The three-question filter
- Is the ingredient a dietary ingredient, and can I say why in a sentence that cites the definition?
- Was it authorised for investigation as a drug before any food or supplement marketing? If yes, the door is closed.
- Has an NDI notification been submitted where required, with safety evidence?
Three noes means you are not in the supplement lane, whatever the label says. At that point the options are the ones set out in the five lawful shapes.
Where MDside sits
We build clinical programmes, not consumer product lines — and we say so early, because the most expensive version of this mistake is discovering the category problem after the packaging is printed. Where a client’s concept only works as a supplement and the ingredient cannot be one, the useful answer is the one nobody wants on the first call.
See how our peptide programs are structured, or read the statutory map.
Related reading
Frequently asked questions
Can peptides be sold as dietary supplements?
Some can — collagen peptides and other food-derived protein hydrolysates are sold lawfully at scale. Designed synthetic peptides generally cannot, because they are not dietary ingredients and are frequently caught by the drug exclusion clause.
Is oral BPC-157 a legal supplement?
It is not an approved drug and has not been established as a lawful dietary ingredient. It is also listed by WADA under non-approved substances and appears on the US Department of Defense prohibited ingredients list.
What is the drug exclusion clause?
A provision excluding from the supplement definition any article approved as a new drug, or authorised for investigation as a new drug where substantial clinical investigations were instituted and made public, unless it was marketed as a food or supplement first. Sequence decides it.
What is an NDI notification?
A notification to the FDA, filed at least 75 days before marketing an ingredient not sold in the US before October 1994, setting out the basis for concluding it is reasonably expected to be safe. Marketing without one where required renders the product adulterated.
Can I sell a topical peptide product without a prescription?
Yes, as a cosmetic, provided the claims stay within cleansing, beautifying and altering appearance, and provided you meet MoCRA obligations including facility registration, product listing, safety substantiation and adverse event reporting. Healing or tissue-repair claims move the product into drug territory.
General information about supplement, cosmetic and drug classification, not legal advice. Product classification is fact-specific and turns on your own claims — have counsel review your labelling and marketing before launch.