Reproductive / hormonal

Peptides and hormones acting on the reproductive (HPG) axis. Several have established medical uses; consumer physique and libido claims often outrun the evidence.

Community-reported ranges are anecdotal and not clinically validated. Evidence grade shown reflects the strength of available human data. Not a prescription. Legal status varies by country and changes over time; verify locally.

3 peptides

Kisspeptin-10

Human observational

KP-10

A peptide central to reproductive-hormone regulation, used in human research. Consumer claims outrun the evidence.

Gonadorelin

Human RCT

GnRH

Synthetic gonadotropin-releasing hormone with established medical uses (diagnostics, fertility). Used off-label alongside TRT to maintain testicular function.

Approved medicine

Oxytocin

Human RCT

A hormone with established obstetric medical uses. Intranasal 'social' and wellbeing uses are researched but not approved for those purposes.

Approved medicine