You may have encountered SS-31 in a longevity blog, a biohacking forum, or — if you searched long enough — listed in the catalog of a grey-market peptide vendor. The pitch is usually some version of: "mitochondrial optimizer, clinically tested, fights aging at the cellular level." The reasonable question is whether any of that reflects […]

Registered dietitian compares collagen peptides bioavailability: hydrolyzed dipeptides, whole protein, bone broth, Verisol, UC-II with RCT evidence.

Sermorelin is a strange case. It was once FDA-approved — sold as Geref, studied in multicenter pediatric trials, used in endocrine clinics for more than a decade. The manufacturer voluntarily pulled it from the market in 2008 for commercial reasons, not safety concerns. And now it lives almost entirely as a compounded peptide marketed by