CITRIC ACID: Allergen or Not An Allergen?

Not An Allergen. Citric Acid Citric acid is commonly used in cosmetics to acidify a product to be closer to the skin’s normal, slightly acidic pH of 4.5-6. Citric acid is so popular in cosmetics partly because it is widely considered to be stable and non-allergenic — it is not on published lists of common allergens. Also, contact dermatitis literature […]