ph-adjuster
Sodium Bicarbonate
Generally safe·Strong evidence
Commonly used to buffer and adjust pH in cosmetics and topical formulations. At the low concentrations used in rinse-off and leave-on products, it is well tolerated. Some individuals may experience mild irritation from high-pH formulations or direct skin contact with concentrated powder.
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.