COMPARE
PopulationAdults with below-average dietary magnesium intakeAdults with regular daylight exposure
EvidenceMODERATE · SMALLSTRONG · MODERATE
RiskLOWLOW
TimeframeFour to eight weeks before judging any effect.Years. This is a long game with a visible payoff.
The decisionFood first. Worth considering when dietary intake is genuinely low; expect a small effect, not a transformation.The single best-supported daily skin intervention. Boring, proven, cumulative.