Every compound in the library
60 compounds, listed alphabetically. Each entry states what the compound is, what it is commonly said to be good for, and what the published research shows. Entries are added continuously; a missing compound is one the library has not reached yet.
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5-Amino-1MQ
Not a peptide · Small molecule
5-Amino-1MQ is a small-molecule NNMT inhibitor, not a peptide. What NNMT does, what the mouse and cell studies found, and how little of it is in humans.
Last checked 2026-09-07
A
Adipotide (FTPP, prohibitin-targeting peptide, Prohibitin-TP01)
Peptide · A short targeting sequence joined to a cell-killing sequence
Adipotide is a fat-targeting peptide sold for weight loss. Searching the trial registry for that name returns nothing — its single human trial is filed as Prohibitin Targeting Peptide 1, and it was stopped with four participants enrolled.
Last checked 2026-09-13
AICAR (acadesine, AICA riboside)
Not a peptide · Not applicable — a nucleoside, not a chain of amino acids
AICAR has one of the largest human records of any compound in this library — a 3,080-patient phase 3 trial among them. Every one of those studies was about heart surgery or leukaemia, and the big one was stopped for futility.
Last checked 2026-09-11
AOD-9604 (also sold as HGH fragment 176-191)
Synthetic fragment analogue · About 16 amino acids
AOD-9604 is a piece of growth hormone, sold for fat loss. Its research file holds 22 papers — seven of them about how anti-doping laboratories find it in urine, and none a human trial.
Last checked 2026-09-10
ARA-290 (cibinetide)
Peptide · 11 amino acids
ARA-290 has what almost nothing else in this library has — a randomized, placebo-controlled, quadruple-masked phase 2 with posted results. Reading those results is the point: the middle dose beat the highest, and on one nerve measure placebo beat all three.
Last checked 2026-09-13
Argireline
Cosmetic ingredient · Hexapeptide (6 amino acids)
Argireline is acetyl hexapeptide-8, sold in wrinkle creams as a topical alternative to botulinum toxin. What it is, what the registered trials actually studied, and how thin the cosmetic evidence is.
Last checked 2026-09-08
B
Bimagrumab (BYM338, LY3985863)
Not a peptide — a monoclonal antibody · Not applicable in the peptide sense: a full-size IgG antibody of roughly 1,300 amino acids across four chains
Bimagrumab is a monoclonal antibody, not a peptide, that blocks the activin type II receptors limiting muscle growth. It missed its endpoint in a muscle-wasting disease, then returned in obesity trials beside semaglutide and tirzepatide. What it is and what the trials show.
Last checked 2026-09-17
BPC-157
Not approved anywhere · 15 amino acids
BPC-157 is a 15-amino-acid peptide from a gastric protein fragment. The healing claims, where they come from, why almost all of them are rodent studies, and its current FDA compounding status.
Last checked 2026-09-06
C
C-peptide (connecting peptide)
A laboratory measurement, not a product · 31 amino acids
C-peptide is the 31-residue piece cut out and discarded when the body makes insulin. It is the most-studied peptide in this library and the only one nobody sells — because its entire value is as a measurement.
Last checked 2026-09-16
Cagrilintide
Not approved alone · Amylin analogue
Cagrilintide is a long-acting amylin analogue tested with semaglutide as CagriSema. What the REDEFINE phase 3 trials reported, and what it is not approved for on its own.
Last checked 2026-09-07
Cartalax (AED, Ala-Glu-Asp)
Peptide · 3 amino acids
Cartalax is a three-amino-acid peptide from the Russian bioregulator tradition. Its entire published record is six papers, every one of them cell culture — and the trial registry has never held a single entry for it.
Last checked 2026-09-11
Cerebrolysin
Not approved in the US · A mixture, not one molecule
Cerebrolysin is a peptide preparation made from enzymatically broken-down porcine brain protein. Widely used in some countries, unapproved in the US — and what the Cochrane reviews concluded.
Last checked 2026-09-07
CJC-1295
Not approved anywhere · GHRH analogue, 30 amino acids
CJC-1295 with DAC has a half-life of days; CJC-1295 without DAC is modified GRF 1-29 and lasts minutes. Vendors sell both under one name. The difference is enormous.
Last checked 2026-09-07
D
Dihexa
Not approved anywhere · Small peptide derivative
Dihexa is an angiotensin IV-derived compound developed to act on the hepatocyte growth factor system. Striking preclinical potency claims — and nothing in people.
Last checked 2026-09-07
DSIP
Not approved anywhere · 9 amino acids
Delta sleep-inducing peptide was isolated in the 1970s from sleeping rabbits. Nearly fifty years later it is still unapproved and still thinly evidenced. Why that matters.
Last checked 2026-09-07
E
Epitalon
Not approved anywhere · 4 amino acids
Epitalon is a four-amino-acid peptide from pineal extract, claimed to lengthen telomeres. The claims are real published findings — the question is who published them.
Last checked 2026-09-07
F
Follistatin
Not approved anywhere · 288 or 315 amino acids, depending on the form
Follistatin blocks myostatin, the brake on muscle growth. That biology is real and well established — but the only trial giving it to people delivers a gene, not a peptide. What it is and what is known.
Last checked 2026-09-08
G
GHK-Cu (Copper Tripeptide-1)
Never approved as a medicine · 3 amino acids
GHK-Cu is a three-amino-acid fragment of human collagen that carries a copper ion. Exactly one randomized controlled trial is indexed for it, in 13 patients, and it found no objective benefit. What the compound is, and what is and is not established.
Last checked 2026-09-07
GHRP-2 (pralmorelin, GPA-748, KP-102)
Peptide · 6 amino acids
GHRP-2 is a six-amino-acid growth hormone secretagogue with 43 randomized controlled trials behind it and one regulatory approval in the world. The approval is for a diagnostic test, and the reason it works as a test is the reason it is weak as a treatment.
Last checked 2026-09-13
GHRP-6 (growth hormone-releasing peptide-6)
Peptide · 6 amino acids
GHRP-6 has a real human pharmacology literature — including a published pharmacokinetic study in nine volunteers. It also has zero entries in the trial registry, and the reason is a date rather than a verdict.
Last checked 2026-09-11
GLP-3 (glucagon-like peptide 3)
Does not exist in humans · No human molecule. The chondrichthyan peptide is a third proglucagon-derived product alongside GLP-1 and GLP-2.
Humans make GLP-1 and GLP-2 and stop. A glucagon-like peptide 3 does exist, in cartilaginous fish, and the one study of what it does found it did not move glucose. What searchers are usually reaching for is retatrutide.
Last checked 2026-09-16
Glutathione
Naturally occurring tripeptide · 3 amino acids
Glutathione has more published research than anything else in this library — 207,068 papers — and 57 entries in the US drug label database. We read all 57. They are homeopathic remedies and skin-whitening creams.
Last checked 2026-09-10
Gonadorelin
Formerly FDA-approved · Decapeptide (10 amino acids)
Gonadorelin is synthetic GnRH, the hormone that tells the pituitary to release LH and FSH. It had two US approvals, both discontinued. What it is, what it does, and what the evidence covers.
Last checked 2026-09-08
H
hCG (human chorionic gonadotropin)
FDA-approved, prescription only · Two chains: an alpha subunit of 92 amino acids and a beta subunit of 145 — 237 in total, plus attached sugars
Human chorionic gonadotropin is a two-chain placental hormone, FDA-approved for fertility and a few hormone conditions. Every US label opens by saying it is not effective for obesity. What it is, what it does, and what the evidence shows.
Last checked 2026-09-17
Hexarelin
Not approved anywhere · Hexapeptide (6 amino acids)
Hexarelin is a growth hormone secretagogue with a substantial human literature from the 1990s and no ClinicalTrials.gov record at all. What it is, why the registry is empty, and what the evidence covers.
Last checked 2026-09-08
Humanin (HN)
Peptide · 24 amino acids
Humanin is a peptide your own mitochondria make, with 542 published papers and 312 carrying a human tag. Every one of its seven trial-registry records measures it rather than gives it — including the two filed as interventional.
Last checked 2026-09-13
I
IGF-1 LR3
Not approved anywhere · 83 amino acids
IGF-1 LR3 is a modified insulin-like growth factor made to be long-acting in cell culture. It was designed as a lab reagent, and that origin explains most of the confusion.
Last checked 2026-09-07
Ipamorelin
Never approved · 5 amino acids
Ipamorelin's entire registered human development was two Phase 2 trials for postoperative ileus, both finished by 2013, neither followed by anything. What it is, what the trials found, and why almost nobody selling it mentions them.
Last checked 2026-09-07
K
Kisspeptin
Not approved · Kisspeptin-10 is 10 amino acids
Kisspeptin is the upstream signal that starts the reproductive hormone cascade. Real human research exists — and kisspeptin-10 is on the FDA's current compounding restriction list.
Last checked 2026-09-07
KPV
Not approved anywhere · 3 amino acids
KPV is the last three amino acids of alpha-MSH, studied for anti-inflammatory effects. What the fragment does, and why the evidence stops where it does.
Last checked 2026-09-07
L
Larazotide (larazotide acetate, AT-1001, INN-202)
Peptide · 8 amino acids
Larazotide is an eight-amino-acid peptide taken by mouth to tighten the gut barrier. Its 307-patient phase 3 in coeliac disease was terminated by its sponsor — and its code name, AT-1001, belongs to a completely different approved medicine.
Last checked 2026-09-15
LL-37 (human cathelicidin, hCAP-18)
Naturally occurring antimicrobial peptide · 37 amino acids
LL-37 is the only cathelicidin the human body makes. Its research is large, entirely academic, and mostly measures the peptide rather than giving it — which is why no product exists.
Last checked 2026-09-10
M
Matrixyl
Cosmetic ingredient · Pentapeptide (5 amino acids) with a palmitic acid tail
Matrixyl is a cosmetic ingredient brand covering palmitoyl pentapeptide-4 and later blends. What the peptide is, what the small literature shows, and why the name itself makes the evidence hard to trace.
Last checked 2026-09-09
Mazdutide
Not approved in the US · A peptide analogue of oxyntomodulin (development codes IBI362, LY3305677)
Mazdutide is a GLP-1 and glucagon dual agonist in late-stage development. Unlike almost everything else in this library, its 41 trial registrations come from fifteen different sponsors — not one.
Last checked 2026-09-09
Melanotan I (afamelanotide)
Peptide · 13 amino acids
Melanotan I is afamelanotide, and it is one of the few compounds in this library with a real approved product — a 16 mg implant for a rare genetic photosensitivity disease. Its US label lists the darkening of moles as a risk to be monitored twice a year.
Last checked 2026-09-15
Melanotan II
Unlicensed · Cyclic peptide
Melanotan II is an unlicensed melanocortin peptide sold for tanning. What it does, why its mechanism causes the side effects it does, and the documented harms.
Last checked 2026-09-07
MOTS-c
Never approved · 16 amino acids
MOTS-c is a 16-amino-acid peptide encoded inside mitochondrial DNA. Humans have it measured constantly in research; almost nobody has been given it. Why that distinction is the whole story.
Last checked 2026-09-07
N
Noopept (omberacetam, GVS-111)
Modified dipeptide — the smallest compound in this library · 2 amino acids, both ends chemically modified
Noopept is the smallest compound in this library — a modified dipeptide designed from piracetam's structure in Moscow. Its mechanism story rests on a metabolite found in rats, and the one human pharmacokinetic study found no metabolites at all.
Last checked 2026-09-15
O
Orforglipron (LY3502970)
Not a peptide — a small molecule · Not applicable. It has no amino acids and no peptide bonds.
Orforglipron switches on the GLP-1 receptor from a completely different chemistry — an 883-dalton small molecule, taken as a daily tablet. 53 registered studies, 27 of them phase 3, 33,058 participants.
Last checked 2026-09-16
Oxytocin
FDA-approved as an injection · Nonapeptide (9 amino acids)
Oxytocin is a nine-amino-acid hormone, approved in the US as an injection to start or strengthen labour and control bleeding after birth. It is sold as a 'love hormone' nasal spray. What it is, what it does, and what the trials show.
Last checked 2026-09-17
P
PT-141 (Bremelanotide)
FDA approved · Peptide, melanocortin receptor agonist
PT-141 is bremelanotide, approved in the US in 2019 as Vyleesi for one specific use in premenopausal women. What the label covers, its stated limitations, and its documented warnings.
Last checked 2026-09-06
R
Retatrutide
Not approved anywhere · Peptide, GIP backbone
Retatrutide activates three hormone receptors and produced the largest weight losses yet reported in a phase 2 obesity trial. It is also not approved in any country, and every registered trial of it belongs to one company.
Last checked 2026-09-08
S
Selank
Not approved in the US or EU · Heptapeptide
Selank is a synthetic peptide based on tuftsin, developed in Russia as an anti-anxiety drug. What it is, where it is used, and how thin the independent evidence is.
Last checked 2026-09-07
Semaglutide
Approved medicine · 31 amino acids
Semaglutide is the GLP-1 drug behind Ozempic, Wegovy and Rybelsus. What it is, what each product is approved for, and why a milligram number on a semaglutide package means nothing until you know which product it belongs to.
Last checked 2026-09-08
Semax
Registered in Russia · 7 amino acids
Semax is prescribed in Russia and has been studied there since the 1990s. It has 207 PubMed records, a single indexed randomized trial, and zero interventional studies on ClinicalTrials.gov. What that combination means.
Last checked 2026-09-07
Sermorelin
Was approved (US) · 29 amino acids
Sermorelin was a licensed American medicine sold as GEREF. It was discontinued in the 2000s, and FDA recorded that the withdrawal was not for safety or effectiveness reasons. What it is, what it was approved to do, and what that history does and does not mean.
Last checked 2026-09-07
SLU-PP-332
Not a peptide · Not applicable — a small synthetic molecule, not a chain of amino acids
SLU-PP-332 is sold as an exercise in a bottle. Its entire published record is ten papers, all preclinical — and two of the ten exist only so anti-doping laboratories can detect it.
Last checked 2026-09-11
SNAP-8 (acetyl octapeptide-3)
Peptide · 8 amino acids
SNAP-8 is an eight-amino-acid cosmetic peptide sold as a topical wrinkle treatment. Its entire clinical record is two microneedle-patch studies — and in both of them it is one ingredient among several, compared against a patch containing nothing.
Last checked 2026-09-13
SS-31 (Elamipretide)
Not approved · Tetrapeptide
SS-31 is elamipretide, a mitochondria-targeting peptide studied in Barth syndrome and primary mitochondrial myopathy. What the trials found, including where they missed.
Last checked 2026-09-07
Survodutide
Not approved anywhere · A peptide analogue of glucagon (development code BI 456906)
Survodutide activates the GLP-1 and glucagon receptors. Its 26 registrations are all but one from Boehringer Ingelheim, and a large part of the programme targets liver disease rather than weight.
Last checked 2026-09-09
T
TB-500
Not approved anywhere · 7 amino acids
TB-500 is Ac-LKKTETQ, a seven-amino-acid fragment of the 43-amino-acid protein thymosin beta-4. Why the two are constantly conflated, what that changes, and what the evidence covers.
Last checked 2026-09-06
Tesamorelin
FDA approved · 44 amino acids
Tesamorelin is FDA-approved as EGRIFTA for reducing excess abdominal fat in HIV patients with lipodystrophy. What the label says, what it explicitly does not cover, and why that distinction matters.
Last checked 2026-09-06
Tesofensine
Not a peptide · Small molecule
Tesofensine is a small-molecule triple monoamine reuptake inhibitor, not a peptide. Where it came from, the weight-loss results, and why it is sold in peptide catalogues at all.
Last checked 2026-09-07
Thymalin (thymus polypeptide complex)
Not a single peptide — a mixture · Not a single defined length — a complex of polypeptides isolated from thymus tissue
Thymalin is not a single peptide but a polypeptide complex extracted from thymus tissue. It has been used clinically in Russia for decades and has 195 human-tagged papers — and zero entries in the international trial registry.
Last checked 2026-09-11
Thymosin Alpha-1
Not FDA-approved · 28 amino acids
Thymosin alpha-1 is an immune-signalling peptide with 64 randomized controlled trials behind it and no FDA approval. What it is, what it is used for, and why its evidence sits outside the US record.
Last checked 2026-09-08
Thymosin beta-4 (Tβ4, TMSB4X)
43-amino-acid protein — the parent molecule of TB-500 · 43 amino acids
Thymosin beta-4 is a 43-amino-acid protein with a genuine registered clinical programme — 18 trials, three of them phase 3. None of them studies the injury it is sold to heal.
Last checked 2026-09-16
Tirzepatide
Approved medicine · 39 amino acids
Tirzepatide is the GIP and GLP-1 agonist sold as Mounjaro and Zepbound. What it is, how it differs from a single-receptor drug, and what its labels state — including the one indication almost nobody knows it holds.
Last checked 2026-09-08
Trevogrumab (REGN1033, SAR391786)
Not a peptide — a monoclonal antibody · Not applicable in the peptide sense: a full-size human IgG antibody
Trevogrumab is a monoclonal antibody, not a peptide, that blocks myostatin. Searched by name, the trial registry shows one study; searched by its code REGN1033, it shows eight, back to 2012. What it is, what it does, and what has and has not been reported.
Last checked 2026-09-17
Triptorelin
FDA-approved · Decapeptide (10 amino acids)
Triptorelin is a ten-amino-acid GnRH agonist with two current US approvals — advanced prostate cancer and precocious puberty in children. Both use it to suppress sex hormones. What it is, how it works, and what the labels show.
Last checked 2026-09-17
V
VIP (vasoactive intestinal peptide)
Naturally occurring hormone · 28 amino acids
VIP is one of the most-studied peptides in human physiology — and the only record in the US drug label database is a raw powder listed by a chemical supplier. What it is, and why the gap is so wide.
Last checked 2026-09-09
By question, rather than by compound
Amino Acid Chart: The Twenty, With the Masses Derived Rather Than Copied
A reference table of the twenty standard amino acids with codes, formulas and residue masses — every number computed from the formula, and the method checked against a real peptide's published mass.
Peptides for Focus and Mood: The Russian Compounds and the Evidence Problem
Semax, Selank, Cerebrolysin and Dihexa. Most of the nootropic peptides come from one research tradition — and that shapes what the evidence can tell you.
Peptides for Immunity: What Is Real Biology and What Is Marketing
Thymosin alpha-1, LL-37, KPV and the immune peptides. Which have genuine clinical use somewhere in the world, and why 'boosting immunity' is the wrong frame.
Peptides for Joints and Tendons: Where the Healing Claims Come From
BPC-157, TB-500 and the rest of the healing group. What the animal evidence shows, what the human evidence does not, and why this is the category with the widest gap.
Peptides for Longevity: The Claims, and What Sits Behind Them
Which peptides are sold on longevity claims, what the evidence for each looks like, and the problem with measuring an intervention meant to work over decades.
Peptides for Sleep: What Is Actually Being Studied, and What Is Not
Which peptides are discussed for sleep, what the evidence behind each one looks like, and why the strongest sleep effects in this field are side effects of something else.
What Are Peptides? A Plain Explanation, and What They Actually Do
A peptide is a short chain of amino acids. What that means, how peptides differ from proteins and from drugs, which ones are approved medicines, and how to read a claim about one.