COMPARE
PopulationHealthy adults training with resistanceAdults with regular daylight exposure
EvidenceSTRONG · MODERATESTRONG · MODERATE
RiskLOWLOW
TimeframeFour to twelve weeks of consistent daily use.Years. This is a long game with a visible payoff.
The decisionOne of the few supplements with a deep evidence base. Reasonable for consistent lifters; consistency matters more than timing.The single best-supported daily skin intervention. Boring, proven, cumulative.