Sodium Benzoate

Sodium benzoate is generally considered low risk in cosmetics due to minimal systemic absorption from topical use. However, as a food additive it has been flagged by some researchers for potential effects at high oral doses, and in combination with vitamin C (ascorbic acid) it can theoretically form trace amounts of benzene — a known carcinogen — under heat or UV exposure. While topical formulations present far lower exposure than dietary intake, a cautious approach is advised during pregnancy; opt for products where it appears low on the ingredient list. No formal reproductive toxicity studies specific to topical cosmetic use have established a definitive risk rating (Sources: EWG Skin Deep; Paula's Choice ingredient dictionary).