Cocamidopropyl Betaine
Ingredient Info
Cocamidopropyl betaine (CAPB) is a gentle cleanser and foaming agent derived from coconut oil. It's commonly used in shampoos, body washes, cleansers, and other rinse-off products to remove dirt and oil while creating lather.
Benefits
- Effective cleansing without excessive harshness
- Boosts foam and lather in rinse-off products
- Helps control product thickness and texture
Potential concerns
- Can cause mild skin irritation in some people, particularly with prolonged contact
- Known allergen affecting 3–7% of the population; contact sensitization has increased over time
- Manufacturing impurities (amidoamine, dimethylaminopropylamine) may increase allergic reaction risk
- May cause eye irritation if not rinsed thoroughly
Science: Recent safety data (2024) confirms CAPB is safe at standard cosmetic concentrations (up to 30% in rinse-off products, 6% in leave-on) with a safety margin greater than 100. However, it was named Allergen of the Year in 2004 due to rising contact sensitization rates, primarily linked to manufacturing impurities rather than the ingredient itself. Most reactions are delayed allergic responses rather than immediate irritation.
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