The dictionary.

A small molecule, not a peptide, studied for how fat cells use energy.

5-Amino-1MQ blocks an enzyme called NNMT that's involved in fat-cell metabolism. The research so far is in cells and mice. It isn't approved for human use, and there are no published human trials.

Also: AOD

A modified fragment of growth hormone once developed as a weight-loss drug.

AOD-9604 is based on the tail end of the human growth hormone molecule. It was tested in human trials for weight loss and didn't show a meaningful effect, so development as a drug stopped. It isn't approved as a medicine.

Also: BAC Water

Sterile water with a small amount of preservative, used to dissolve freeze-dried powders.

Research peptides usually arrive as a freeze-dried powder that has to be dissolved before use. Bacteriostatic water is sterile water containing 0.9% benzyl alcohol, which slows bacterial growth. It's a lab and pharmacy supply, not a peptide.

Also: Body Protection Compound 157

A synthetic peptide studied in animals for tissue and gut repair.

BPC-157 is based on a fragment of a protein found in stomach fluid. Most of the research is in rodents, looking at tendons, ligaments, the gut, and wound healing. Human trials are very limited, it isn't approved for human use, and the FDA has listed it among substances with unresolved safety questions.

An experimental long-acting version of amylin, a hormone involved in fullness.

Cagrilintide is an amylin analog being developed by Novo Nordisk, mostly in combination with semaglutide. It's in clinical trials for weight management. It's investigational and not approved.

Also: CJC (No DAC) · Mod GRF 1-29

A lab-made version of the hormone that tells the body to release growth hormone.

CJC-1295 is an analog of growth hormone-releasing hormone (GHRH). The "no DAC" version is shorter-acting. It was studied in early clinical research but never approved, and it's sold only as a research compound.

Also: CJC (No Dac) + Ipamorlin · CJC + Ipa

Two growth-hormone signaling peptides sold together in one vial.

This blend pairs CJC-1295 (no DAC), a GHRH analog, with ipamorelin, a ghrelin-receptor agonist. Each has been studied in lab and early human research for growth-hormone release. Neither is approved for human use, and the pair hasn't been studied as a product.

Also: Delta sleep-inducing peptide

A small peptide first isolated in the 1970s and studied for sleep.

DSIP was named for its apparent link to deep sleep in early animal work. Later studies, including a few small human ones, gave inconsistent results, and its natural role is still unclear. It isn't approved for human use.

Also: Epithalon · Epithalone

A four-amino-acid peptide based on a pineal gland extract, studied in aging research.

Epitalon is a synthetic version of a peptide from epithalamin, a pineal extract. Most of the research comes from a small number of Russian labs, in cells and animals, looking at telomeres and circadian rhythm. It isn't approved for human use.

Also: GHK · Copper peptide · GHK 50mg

A natural copper-binding peptide best known from skincare.

GHK-Cu occurs naturally in the body and declines with age. It's mostly studied in cell cultures and topical skincare, looking at collagen and wound healing. The injectable research form hasn't been well studied in people and isn't approved for human use.

Also: GLOW Blend 70mg

A multi-peptide research blend aimed at skin and tissue models.

Peptides ATX describes GLOW as a 70mg multi-peptide blend for laboratory skin and extracellular-matrix research. ATX doesn't publish its exact components or ratios. It isn't approved for human use.

The antioxidant your cells make themselves, also sold as a supplement.

Glutathione is a three-amino-acid molecule central to how cells handle oxidative stress. It's studied for antioxidant status and liver function, and a few small trials have looked at skin tone. How much supplemental glutathione changes levels inside cells is still debated.

Also: Insulin-like growth factor 1 · Mecasermin

The growth factor that carries out many of growth hormone's effects.

IGF-1 is made mostly in the liver in response to growth hormone. A prescription form (mecasermin) is FDA-approved for a rare growth disorder in children. Research versions aren't approved for human use.

Also: Ipamorlin

A five-amino-acid peptide that triggers growth-hormone release through the ghrelin receptor.

Ipamorelin is studied for releasing growth hormone without much effect on cortisol or prolactin. It reached early clinical trials but never completed development as a drug. It isn't approved for human use.

Also: KLOW Blend 80mg

A larger multi-peptide research blend, related to GLOW.

Peptides ATX describes KLOW as an 80mg multi-peptide blend for laboratory signaling research. ATX doesn't publish its exact components or ratios. It isn't approved for human use.

A three-amino-acid fragment of a skin-pigment hormone, studied for inflammation.

KPV comes from the tail of alpha-MSH, a melanocortin hormone. It's been studied in cells and animals for gut and skin inflammation. There's little human research, and it isn't approved for human use.

Also: MT-1 · Afamelanotide

A synthetic version of the hormone that triggers skin pigmentation.

Afamelanotide, a form of melanotan I, is approved as a prescription implant (Scenesse) for a rare light-sensitivity disorder. It is not approved for cosmetic tanning, and research versions sold online aren't the approved product.

Also: MT-2

An unapproved synthetic tanning peptide that regulators have repeatedly warned about.

Melanotan II acts on several melanocortin receptors, which affect pigmentation and also appetite and sexual function. It has never been approved anywhere, and health regulators in the US, UK, and Australia have warned against using it.

Also: MOTS · MOTS 10mg

A peptide encoded in mitochondrial DNA, studied for metabolism.

MOTS-c belongs to a family of mitochondrial-derived peptides first described in the last decade. Research is mainly in mice and cells, looking at insulin sensitivity and exercise-like effects. Human data is very early, and it isn't approved for human use.

Also: Nicotinamide adenine dinucleotide

A coenzyme every cell uses to make energy; levels fall with age.

NAD+ is central to metabolism and to enzymes linked with aging. It's studied in cells, animals, and early human trials, mostly using oral precursors like NR and NMN. Whether raising NAD+ changes how people age is unproven.

Also: Bremelanotide

A melanocortin peptide approved as a prescription drug for low sexual desire.

Bremelanotide is FDA-approved, as Vyleesi, for a specific desire disorder in premenopausal women, and requires a prescription. It grew out of melanotan research. Research versions sold online aren't the approved product.

Also: GLP-3 · Reta

An experimental weight-loss drug that acts on three hormone receptors.

Retatrutide targets GIP, GLP-1, and glucagon receptors and is in late-stage clinical trials by Eli Lilly. It's investigational and not approved. Research versions are sometimes labeled "GLP-3."

A synthetic peptide developed in Russia, studied for anxiety and attention.

Selank is modeled on tuftsin, a fragment of an immune protein. It's registered as a medicine in Russia, where most of its research comes from. It isn't approved in the US.

Also: Ozempic · Wegovy · Sema

The GLP-1 drug behind Ozempic and Wegovy.

Semaglutide mimics GLP-1, a gut hormone involved in appetite and blood sugar. It's an FDA-approved prescription drug for type 2 diabetes and weight management. It should only be used under a prescriber's care.

Also: Semx

A synthetic peptide from Russia, studied for cognition and nerve protection.

Semax is built from a fragment of ACTH, a pituitary hormone. It's registered in Russia and studied there in clinical and animal research for cognition and stroke recovery. It isn't approved in the US, and Western trials are lacking.

Also: Serma

A short version of the hormone that signals growth-hormone release.

Sermorelin is the first 29 amino acids of GHRH. It was once FDA-approved (as Geref) but was discontinued by its maker. It isn't sold as an approved drug today, and research versions aren't approved for human use.

Also: Thymosin beta-4 fragment

A synthetic fragment of thymosin beta-4, studied in animals for tissue repair.

TB-500 is based on part of thymosin beta-4, a protein involved in cell movement and repair. Research is mainly in animals. It isn't approved for human use and is banned in competitive sport.

Also: Tesa · Egrifta

A prescription growth-hormone-releasing drug for a specific type of belly fat.

Tesamorelin is a GHRH analog. It's FDA-approved, as Egrifta, for excess abdominal fat in people with HIV-associated lipodystrophy, and requires a prescription. Research versions sold online aren't the approved product.

Also: Mounjaro · Zepbound · GLP-2

The dual GIP/GLP-1 drug behind Mounjaro and Zepbound.

Tirzepatide acts on two gut-hormone receptors involved in appetite and blood sugar. It's an FDA-approved prescription drug for type 2 diabetes and weight management. Research versions are sometimes labeled "GLP-2," which is confusing: GLP-2 is also the name of a different natural hormone.

Also: Wolverine Blend 5/5

BPC-157 and TB-500 combined in one research vial.

Per Peptides ATX, each vial combines 5mg of BPC-157 and 5mg of TB-500. Each peptide has been studied separately, mostly in animal models of tissue repair; the combination hasn't been. Neither is approved for human use.