HackedSelf is practical biohacking for longevity: protocols, supplement stacks, and gear reviews grounded in evidence-first analysis. Recent articles: a sauna cardiovascular protocol compared against Zone 2 cardio with a 175-degree minimum dose; strength training tested against muscle-age benchmarks through grip, gait, and lower-body power; the semaglutide longevity evidence and its narrow HIV-patient data caveat; home sauna running cost per session with break-even math against gym lounges; and XPRIZE Healthspan results audited against the prize rules. Effect sizes, protocol doses, and n=1 caveats stated plainly.