The library
The peptide research library
Search by name, alias, or effect; compare evidence grades; and inspect the sources and preliminary regulatory research behind every entry.
5-Amino-1MQ
A small molecule (not technically a peptide) that inhibits an enzyme linked to fat-cell metabolism — genuinely interesting animal biology, essentially no human trial data.
Anastrozole
A licensed aromatase-inhibitor medicine used off-label in some TRT programmes to manage oestrogen — genuinely effective at its core job, but its routine use in TRT is increasingly debated by endocrinologists.
AOD-9604
A modified fragment of growth hormone that failed to beat placebo for weight loss in its own phase-2b trial — one of the weaker evidence cases in this library, despite heavy marketing.
BPC-157
A synthetic fragment discussed in the community for soft-tissue repair — animal studies only so far, human evidence limited.
Cagrilintide
An amylin-pathway weight-loss drug being trialled alongside semaglutide (as 'CagriSema') — promising phase-3 data, but not yet an approved standalone medicine.
CJC-1295
A growth-hormone-releasing hormone analog usually stacked with Ipamorelin — early human pharmacology, research-only status.
Dihexa
An extremely potent nootropic candidate in rodent studies — one of the most experimental compounds here, with essentially no human safety or efficacy data.
DSIP
An old research compound from the 1970s-80s studied for deep-sleep and stress effects — small, dated human trials with inconsistent results.
Enclomiphene
A selective oestrogen-receptor modulator that raises natural testosterone without suppressing fertility — promising trial data, but not a standard licensed UK medicine.
Epithalon
A Russian-developed tetrapeptide studied for circadian rhythm and cellular ageing markers — animal-heavy evidence, no UK licence.
Follistatin-344
A myostatin-blocking peptide with dramatic effects in animal studies — essentially untested in humans, with real theoretical safety questions.
GHK-Cu
A copper tripeptide with the strongest cosmetic evidence base of the popular peptides — legal in UK skincare within limits.
GHRP-2
A potent growth-hormone secretagogue that also stimulates appetite — human pharmacology is documented, downstream physique claims are not.
GHRP-6
One of the oldest GH secretagogues, known above all for a powerful appetite-stimulating effect — human data on the GH pulse is real, on the physique benefits is not.
Glutathione
The body's main antioxidant, sold as an injectable for detox, immunity and skin brightening — with real regulatory safety warnings attached to the unlicensed injectable version.
Gonadorelin
The natural hormone that starts the entire reproductive-hormone cascade — real pharmacology, but limited current UK-licensed availability for TRT-adjunct use.
HCG
A licensed fertility medicine used off-label in TRT programmes to preserve fertility and testicular size — genuine mechanism, established medical use.
Hexarelin
The most potent of the GHRP family — a strong, well-documented GH pulse, but also the most consistent reports of cortisol/prolactin spiking and rapid tolerance.
HGH
The real, licensed growth hormone medicine — genuinely effective for its approved indications, but sourcing it outside a prescription for recomposition or anti-ageing is unsafe and outside the law.
HGH Fragment 176-191
The original growth-hormone fat-burning fragment that AOD-9604 was engineered from — mostly animal data, marketed for fat loss without significantly affecting blood sugar.
IGF-1 DES
A short-acting, localised cousin of IGF-1 LR3, favoured for targeted 'spot' injection — even less human data exists than for LR3.
IGF-1 LR3
An engineered, long-acting version of IGF-1 aimed at systemic muscle and tissue growth — potent, WADA-banned, and carries real, well-documented hypoglycaemia risk.
Ipamorelin
A selective growth-hormone secretagogue popular in 'GH' stacks — mostly early human and preclinical evidence, research-only in the UK.
Kisspeptin-10
A genuine, actively-researched reproductive-hormone peptide — real human trial data exists (including from UK academic research), but it's not an approved treatment.
KPV
A three-amino-acid fragment of alpha-MSH discussed for gut and skin inflammation — animal data only, no human trials.
LL-37
A naturally occurring antimicrobial peptide studied for wound healing and immune defence — one of the least human-tested peptides in this library.
Mazdutide / Survodutide
Two separate, newer dual-pathway weight-regulation drugs from different developers — both still investigational, grouped here because the community usually discusses them together.
Melanotan II
A tanning peptide with a real, plausible mechanism and a real UK regulatory warning history — one of the more clearly flagged compounds in this library.
MOTS-c
A mitochondrial-derived peptide studied for metabolism and exercise — genuinely interesting biology, but human data is still early.
NAD+
A cellular-energy coenzyme sold as an injectable/IV boost for brain energy and longevity — real biochemistry, thin direct human trial support at the doses marketed.
Oral collagen peptides
The most mainstream entry in this library — an over-the-counter food supplement with genuine, if modest, human trial support for skin hydration and elasticity.
Oxytocin
A licensed hormone for a specific obstetric use — the 'cuddle hormone' bonding/libido story from nasal-spray marketing is far less consistently supported.
PT-141
A melanocortin peptide for sexual desire — the active ingredient is a licensed medicine (Vyleesi) in some markets, but research-grade 'PT-141' is a different lane.
Retatrutide
An investigational triple-pathway weight-loss drug generating early buzz for aggressive fat-loss trial results — still in clinical trials, not yet approved anywhere.
RU-58841
A topical anti-DHT compound for hair retention, developed but never brought to full approval — strong anecdotal history, no completed human trials published.
Selank
Semax's calmer sibling — a Russian anxiolytic peptide used for anxiety and mood, with the same 'clinical there, research-only here' caveat.
Semaglutide
A licensed GLP-1 medicine for type-2 diabetes and weight management — the one item here with strong human evidence and a clear Rx route.
Semax
A Russian-developed nootropic peptide used for focus and neuroprotection — most clinical data is Russian and hard to verify, research-only elsewhere.
Sermorelin
A GHRH analog that was once a licensed medicine (Geref) before being withdrawn from the commercial market — now sourced only through unlicensed/compounded routes.
SS-31 / Elamipretide
A mitochondria-targeted peptide in active clinical trials for genuine rare diseases — one of the better-evidenced longevity-adjacent compounds here, but still unapproved.
TB-500
A thymosin beta-4 derivative discussed alongside BPC-157 for recovery — preclinical evidence, no human approval.
Tesamorelin
A GHRH analog approved abroad (as Egrifta) specifically for HIV-associated abdominal fat — not licensed for general fat loss, and not available via routine UK prescription.
Testosterone (TRT)
The foundation of testosterone replacement therapy — a genuine, well-understood licensed medicine when prescribed and monitored for diagnosed low testosterone.
Thymosin Alpha-1
An immune-modulating peptide with genuine overseas clinical history (as Zadaxin) — but no UK licence, so it sits outside the standard prescription system here.
Tirzepatide
A licensed dual-pathway weight-loss and diabetes medicine with some of the strongest trial results in this entire library — a genuine prescription medicine, not a research chemical.
Showing 45 of 45 peptides