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Guides across all compounds
PeptideHound documents what published research reports for 49 peptide research compounds: what was studied, in what model, at what amounts, and what remains unknown.1
Enter what is on your vial and the diluent you added. Arithmetic only; it never suggests an amount.
mg × 1000 ÷ mL = mcg/mL
mcg ÷ (mcg/mL) = mL · mL × 100 = units
Side effects and interactions, with the evidence behind each.
All 49 safety pages →193 sellers on record, 190 fully checked. Never a ranking.
What each record checks →49 compounds1,529 citations linked193 vendor recordsUpdated How we source
Every page below states what the research found, labels the kind of study it came from, and says plainly what has not been studied.
GLP-1 is two things with one name: a hormone your gut releases after a meal, and a group of prescription medicines built to copy that hormone's signal. A 2025 review describes the two gut-derived incretin hormones, GIP and GLP-1, as playing a crucial role in glycemic control.
Tirzepatide is an approved once-weekly injection that switches on two gut-hormone receptors at once, and it has been tested in thousands of people. A 2025 review records that it is approved at the same doses (5, 10 and 15 mg) for both type 2 diabetes and chronic weight management.
Semaglutide is a once-weekly injection that copies a gut hormone the body releases after a meal. Unlike most compounds on this site, it has a genuine FDA approval and an unusually large body of human evidence. A 2023 review records that it was recently approved by the US Food and Drug Administration for chronic weight management.
BPC-157 (body protection compound 157) is a research compound made of 15 amino acids. The animal evidence is broad; the human evidence has barely begun.
Collagen peptides (hydrolysed collagen) are the structural protein of skin, bone and tendon, broken into short fragments and taken by mouth as a powder. Unlike most compounds on this site, they have a substantial record of randomised human trials. The problem is that the trials are small, short, and nearly always run on one branded preparation.
HGH is human growth hormone. What is sold under that name is a manufactured copy, called somatropin on a pharmacy label: a prescription medicine with a large, genuine approval record that is far narrower than most people expect. Every approval names a diagnosis, and none of those diagnoses is ageing, muscle or sport.
Retatrutide is a research compound that switches on three gut and pancreatic hormone receptors at once. Its human evidence is unusually strong, but no regulator has approved it.
MOTS-c is a research compound the body makes itself: a short peptide encoded inside mitochondrial DNA. No study we could find has given it to a person.
IGF-1 (insulin-like growth factor 1) is three things that share one name. It is a hormone the body makes on orders from growth hormone. It is mecasermin, an approved medicine for one rare growth disorder in children. And it is a research compound, usually IGF-1 LR3, sold to people who want more muscle. Most of the confusion comes from treating them as one.
PT-141 (bremelanotide) is one of the few compounds on this site with a real approval. In 2019 the FDA approved it in the USA for premenopausal women with acquired, generalized hypoactive sexual desire disorder: a persistent loss of sexual desire that causes marked distress.
Melanotan is not one research compound but two. Melanotan-I and Melanotan-II are different molecules, with different evidence behind them and completely different legal standing.
GLOW is not a single research compound. It is three of them used together: GHK-Cu, BPC-157 and TB-500. No study we could find has tested that combination.
The gaps in the evidence matter as much as the findings.
Status is a regulatory fact, not a rating.
Hormone made in nerves — human data is mostly measured levels and single research infusions
Mitochondria-targeted; studied mainly in rare mitochondrial disease
Daily GLP-1 drug approved for type 2 diabetes and weight management
Pregnancy hormone with a fertility-care trial record — no weight-loss trial behind the page
Marker of the pancreas's own insulin output — measured, not taken
Approved for low sexual desire in premenopausal women
For a reader who has not picked a compound yet — what these are, how they are used, and how they compare.
Arithmetic, shown step by step. None of these tools suggests an amount to use.
Twelve-month change in search interest. A rising line means more people are looking, not that a compound works.
193 sellers on record; 190 have a completed record so far, checked against business registries, FDA enforcement and domain history. The rest are listed with no finding yet. Never a rating or a ranking.
A peptide is a short chain of amino acids — the same building blocks as a protein, just fewer of them. The body makes thousands of them, and they act as signals: telling a cell to release a hormone, to repair, to take in fuel.
That signalling is why they draw interest, and it is also why the category is so uneven. A few are approved drugs with large trials behind them. Most of the compounds people search for have been studied only in animals or cells, and some have never been given to a person at all. We label which is which on every page, because the difference is the whole story.
Cited, or not written
Every claim carries the sentence from the source that supports it, checked character-for-character before the page can publish.
Evidence, labelled
Each claim shows the kind of study behind it — human trial, animal model, cell work — so you can weigh it yourself.
What we don't know
Every compound page says plainly what has not been studied. The gaps matter as much as the findings.
Pages are re-checked against their sources on a rolling basis. The date is when a person last read the page against the papers behind it.