Isostearic Acid

⚠️Warnings

What to watch for and avoid: 1) Skin irritation: some reviews note possible mild skin or eye irritation — stop use if you get redness, itching, or burning (source: Cosmetic Ingredient Review). 2) Increased absorption: this ingredient can act as a penetration enhancer, so it may increase how much of other chemicals get into your skin — be cautious with products that contain many active ingredients. 3) Hormone-related findings: a few studies reported weak hormone-related activity; while overall risk is low, people with hormone-sensitive conditions and pregnant or breastfeeding adults may want to avoid heavy or frequent use (source: National Toxicology Program). 4) Product restrictions: some product-verification programs require manufacturers to provide extra safety information before allowing its use — that means not all products will include it or manufacturers may limit its amount (source: Cosmetic Ingredient Review). 5) Environment: there are some environmental toxicity notes; prefer products from companies that disclose sourcing and manufacturing practices if this matters to you (source: Environment Canada).