idunpeptides Review & Prices

Retatrutide is an experimental once-weekly injection from Eli Lilly (internal code LY3437943). It's a single molecule that activates three receptors: GIP, GLP-1, and glucagon. Tirzepatide covers the first two, and retatrutide adds the third. It isn't approved anywhere, for anything. Lilly has said it plans to file with the FDA in the first quarter of 2027. On Peptide Grading , we list the research-labeled vials with sizes, price per mg, and COAs side by side. Being listed there isn't an endorsement, and those vials aren't Lilly's product.

BPC-157 is a 15-amino-acid peptide first described from gastric juice. Most of the published work is preclinical, with studies covering tendon, muscle, gastrointestinal, vascular, and other injury models. Researchers have looked at several signaling pathways, including VEGFR2, nitric oxide, Akt-eNOS, and ERK1/2 . Other work has focused on angiogenesis, fibroblast activity, endothelial responses, and inflammation. Human data are still sparse. Small studies have looked at knee pain, interstitial cystitis, and intravenous safety and pharmacokinetics , but the number of human studies remains small and larger controlled trials are not available.

If you've ever seen a blue-tinted skincare serum, you've already met GHK-Cu. It's a copper-carrying tripeptide that was first pulled out of human blood plasma back in 1973, and it's been sitting in cosmetics for decades. What's newer is its life as a research peptide: vials of it, and blends like Glow and Klow that put it alongside BPC-157 and TB-500 . I'll say upfront that GHK-Cu is a bit unusual in this catalog. It has a long research history, and the skin-care version is a mainstream cosmetic ingredient. But no GHK-Cu drug is approved by the FDA, and the injectable side is much less studied than the creams. On Peptide Grading , we line up the research-labeled listings, with vendors, sizes, price per mg, and COAs , so you can see the differences. A listing isn't a recommendation to use it.

Ipamorelin is a five-amino-acid peptide that switches on the ghrelin receptor and makes the pituitary release growth hormone. Novo Nordisk researchers built it in the 1990s, and what made it interesting was how narrow its effect looked. Older compounds in the same family pushed up other hormones too. Ipamorelin mostly didn't. It has no approved use anywhere. A Phase 2 trial in the early 2000s tried it for a bowel problem after surgery, and it didn't work well enough to continue. So what's left is mostly lab and animal data, and the research-labeled vials that vendors sell. On Peptide Grading , we list those vials with vendors, sizes, price per mg, and COA documents in one place, so you can compare them without hunting through tabs.

Klow Stack is Glow plus KPV: four peptides ( GHK-Cu , BPC-157 , TB-500 , KPV) in one vial. Each one is researched for a different job, from tissue remodeling to inflammation. The catch is that the research is on the peptides individually, mostly in animals. Nobody has published results on the blend itself. Klow packs them into a single product instead of four separate vials. On Peptide Grading , we track Klow Stack listings in one place: vendors, vial sizes, price per mg, shipping details, and certificate of analysis (COA) documents, so you don't need ten tabs open to compare them.

A BPC-157 and TB-500 blend, often called the "Wolverine Stack" is an informal combination of two synthetic peptides studied for tissue repair, cellular movement, and recovery

Cagrilintide is based on amylin , a hormone that helps regulate appetite and blood sugar after eating. Its structure was modified from natural amylin to make the peptide last longer. Unlike semaglutide, which mainly targets the GLP-1 receptor , cagrilintide acts through amylin and calcitonin-family receptors . Cagrilintide has also been studied on its own and together with semaglutide. Peptide Grading lists cagrilintide research materials from different suppliers. Listings can include supplier details, reported specifications, COA, quantities, shipping information, and price per mg .

Melanotan II is a lab-made peptide modeled on α-melanocyte-stimulating hormone (α-MSH), the natural hormone that tells your skin to make pigment. Researchers built it to understand how the melanocortin receptor system works, especially the pathways behind melanin production. It's tempting to file MT-II under "tanning peptides," but that undersells it. It acts on several receptors, not just one, and that's why human studies have looked at both skin pigmentation and erectile function. The case reports that followed raised some real safety questions. On Peptide Grading , we track MT-II research listings in one place: vendors, quantities, prices, shipping details, and certificate of analysis (COA) documents, so you don't have to open ten tabs to compare them.

MOTS-c is a 16-amino-acid mitochondrial-derived peptide encoded by a short open reading frame in the mitochondrial 12S rRNA region. Peptide Grading tracks MOTS-c vendors, quantities, prices, shipping details, and COA information to make research-product listings easier to compare.

Selank comes from tuftsin, a peptide that occurs naturally in the body. It is made up of seven amino acids, which puts it in the heptapeptide group. There has been research on Selank for a number of years. Most of it has been done in experimental models. A smaller number of studies have involved people. Researchers have looked at several things along the way, including GABA, enkephalin activity, stress responses, and neurotrophic factors . However, these findings do not change Selank's current regulatory status.