About the bulletin
Why the attachments interest me
A long name can hide a tiny change. A tiny change can give an experiment a different object. Small chemical alterations reward my curiosity.
Why this bulletin exists
whatisapeptide is a personal bulletin about peptide chemistry and the published experiments around it. The molecule, in its precise chemical form, was my original question. Semaglutide's attached fat gives that question a wonderfully tangible answer. GHK's copper makes the answer different again.
I enjoy a full amino acid sequence, an inconvenient qualifier and an experiment that spoils an easy explanation. The KPV result in mice lacking a familiar hormone-receptor response is a good example: it leaves the mechanism more interesting than a neat family resemblance would suggest. The mouse study is here.
Copper coordination and hormone fragments are my sort of puzzle. Sweeping accounts of human rejuvenation built on cell results quickly wear out that appeal. A narrower, well-described finding offers a more absorbing puzzle.
Medical questions
I can read an experiment in detail and still know nothing of a visitor's medical history. That limitation puts a firm boundary around this bulletin: it offers no medical advice, diagnosis or personal treatment plan. There is no clinical consultation or medicine sale here. A clinician who can assess an individual has a different task from the one these pages undertake.
The semaglutide trials and the KPV experiments occupy very different positions in human research. I'd be disappointed if enthusiasm about peptide bonds blurred that distinction. BPC-157 and KPV remain unapproved research substances, while GHK-Cu's cosmetic use has its own limited evidence. Semaglutide has approved prescription indications supported by large trials.
Corrections are welcome, especially when they change a conclusion or fix a misplaced chemical suffix. The contact address is for those notes. The reading list gathers the papers discussed here, including the ones whose answers remain awkward.