Descriptive：
Cocamidopropyl betaine (CAPB) is an amphoteric synthetic detergent that has been increasingly used in cosmetics and personal hygiene products (eg, shampoos, contact lens solutions, toothpaste detergents, makeup removers, bath gels, skin care products, cleansers, liquid soaps, antiseptics, and gynecologic and anal hygiene products) because it induces relatively mild skin irritation.
Effects on the skin：
CAPB is a surfactant derived from coconut oil. A surfactant is a substance that removes oil, thus making removal easier. While CAPB has a low risk of skin irritation, it is a safe ingredient for most people.
In skincare, it plays a huge role in skin moisturizing and soothing. Even the most sensitive skin reacts well to this ingredient. It holds water and moisture so well that it's a crucial ingredient in many hydrating shampoos.
Since it binds to dirt, it's great for ridding the skin of oil and grime picked up from the day. It's also good at removing makeup. Being derived from coconuts, cocamidopropyl betaine is very hydrating
One of the key benefits of Cocamidopropyl betaine is its ability to create a rich, luxurious foam that enhances the cleansing experience. It also helps to break down oils and dirt on the skin and hair, making them easier to rinse away.
irritating：
It is possible for cocamidopropyl betaine to cause skin irritation, however, it isn't clear if that is due to the chemical itself or to residues of the reagents from which it is produced. The cosmetics industry claims that if the compound is properly purified it is not irritating.
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