Which peptides are approved for people, and which aren't

The word "peptide" tells you almost nothing about whether something is safe, legal or sensible. Insulin is a peptide. So is the growth hormone analogue your neighbour's clinic is selling him. So is the vial of BPC-157 on a website with a disclaimer at the bottom saying the contents are for laboratory research only.

What matters is which regulatory bucket a given compound sits in. There are three, and once you can sort a name into the right one, most of the confusion goes away.

Bucket one: approved drugs with defined uses

A long list of peptides are approved medicines in the United States, prescribed for specific conditions and manufactured under the same rules as any other drug.

• Insulin and its analogues, for diabetes.
• GLP-1 receptor agonists including semaglutide, liraglutide, dulaglutide and exenatide, plus the dual-agonist tirzepatide, for type 2 diabetes and, for several of them, for obesity.
• Teriparatide, a parathyroid hormone analogue, for osteoporosis.
• Octreotide, a somatostatin analogue, for acromegaly and certain tumours.
• Leuprolide and similar GnRH analogues, used in prostate cancer and other conditions.
• Desmopressin, a vasopressin analogue.
• Tesamorelin, a growth hormone releasing hormone analogue, approved narrowly for excess abdominal fat in people with HIV-associated lipodystrophy.
• Mecasermin, recombinant IGF-1, for severe primary IGF-1 deficiency.
• Setmelanotide, for specific rare genetic obesity syndromes.

Notice the pattern. Every one of these is approved for something, not approved in general. Tesamorelin being a real drug doesn't make growth hormone releasing peptides a real category of recovery aid. It makes tesamorelin a treatment for one condition in one population.

Growth hormone itself sits in the same place, and it's worth being blunt about. Somatropin is approved for growth hormone deficiency and a handful of other conditions. Under US federal law, distributing it for athletic performance or anti-ageing is a felony, not a grey area. Clinics that skate near this line usually do it by prescribing something adjacent instead.

Bucket two: approved somewhere, or once, but not the way it's being sold

This is where most of the marketing lives.

Sermorelin was an approved product in the US and was pulled from the market years ago for commercial reasons, not safety findings. Today it's compounded. The word "FDA-approved" gets attached to it in conversation because it once was, which is not the same as being an available approved medicine now.

Thymosin alpha-1 is approved in a number of countries outside the US and is not an approved drug there.

Afamelanotide is approved for a rare light-sensitivity disorder. It is frequently confused with melanotan II, which is a different compound and is approved nowhere.

Then there's compounding. Compounding pharmacies can make preparations that aren't commercial products, but they can only use bulk substances the FDA hasn't flagged. In 2023 the agency moved a group of popular peptides into the category reserved for substances that raise significant safety concerns, which effectively closed the door on compounding them. BPC-157, ipamorelin, CJC-1295, epitalon, kisspeptin and melanotan II were among them. Any clinic still supplying those isn't operating in a legal grey zone. It's operating outside the rules.

Compounded GLP-1 medications are their own mess. When the branded products were in shortage, compounded versions filled the gap, and regulators reported problems with dosing errors and with salt forms of semaglutide that aren't the same substance as the approved drug. If you're considering a compounded version of anything, ask specifically what the active ingredient is and who made it.

Bucket three: not approved anywhere, for anything

BPC-157. TB-500 and thymosin beta-4. Ipamorelin. CJC-1295. GHRP-2 and GHRP-6. Hexarelin. AOD-9604. Epitalon. IGF-1 LR3. Melanotan II. Follistatin. MK-677 gets lumped in here too, though it isn't a peptide at all.

None of these has been approved as a medicine in the US. Most have never completed a full human trial programme. Some have interesting early data, which is a different thing from evidence that they're safe to inject for years.

The sales channel tells you the rest. These are sold as research chemicals, labelled "not for human consumption," from sellers who accept cryptocurrency and don't ask questions. That label isn't a formality. It's the legal structure that lets the sale happen at all, and it means nobody has certified what's in the vial, at what purity, or whether it's sterile.

Peptide vials need sterile handling and cold storage. A powder produced in a facility nobody has inspected, shipped through a warm distribution chain, reconstituted on a kitchen counter, is a genuine infection risk before you get anywhere near the question of whether the compound works.

If you get drug tested, stop here

Military, law enforcement, competitive athletes, some corporate roles: this matters to you more than the pharmacology does.

The World Anti-Doping Code prohibits growth hormone secretagogues as a class, which covers ipamorelin, CJC-1295, the GHRPs and MK-677. Thymosin beta-4 is prohibited. BPC-157 was added explicitly in 2022. Anything with no approval for human therapeutic use falls under the catch-all category for non-approved substances, banned at all times.

"I didn't know" has never worked as a defence. Neither has "it was just for a tendon."

What to ask before you hand anybody money

If a clinic is offering peptide therapy, the questions are short.

• What exactly is the compound, by generic name?
• Is it an FDA-approved product, and for what indication?
• If it's compounded, which pharmacy, and is the substance on the permitted bulk list?
• What are you monitoring, and how often?
• What's the exit plan if it doesn't work?

A clinic with good answers will give them quickly. One that talks about "cutting-edge protocols" and can't name a supplier is selling you something else.

Bring the same questions to your own doctor before you start, not after. Someone who knows your bloodwork and your history is the only person who can tell you whether any of this belongs in your life. That's not a disclaimer, it's the actual answer.

The part nobody selling this will tell you

Most guys looking into peptides are looking for recovery. They're thirty-eight, they've got two kids and a job, the shoulder hurts, and progress stalled two years ago.

None of the compounds above fixes six hours of sleep. None of them fixes eating whatever's left on your kid's plate at seven and calling that dinner. None of them fixes lifting hard for three weeks and then nothing for five.

Recovery is mostly sleep, protein, consistent loading, and not doing the thing that hurts your shoulder. That's unglamorous and it's slow and it works for decades. The gray-market vial is fast and interesting and carries a risk you can't size, because nobody has measured it.

The approved list is short for a reason. Everything on it had to prove it did more good than harm in actual people, under observation, with someone accountable for the result. That's a high bar. It's also the only bar worth clearing when the thing in question is going into your body twice a day while your kids are asleep down the hall.