ph-adjuster
Magnesium Hydroxide
Generally safe·Moderate evidence
An inorganic salt used as a pH adjuster and mild absorbent in cosmetic formulations. Well tolerated in typical cosmetic concentrations; very low skin penetration due to particle size and insolubility at skin pH.
References
Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.