Cocamide DEA is a fatty acid diethanolamine condensate derived from coconut oil, used in cleansers and shampoos as a foaming agent, viscosity builder, and emulsion stabilizer. It functions as a base formulation ingredient rather than a therapeutic active.
| Reported effect | How often | Notes |
|---|---|---|
| Allergic contact dermatitis | Uncommon | A recognized contact allergen in shampoos and cleansers; positive patch-test reactions reported among individuals with hand or facial dermatitis. |
| Skin and scalp irritation | Uncommon | May contribute to mild irritation, dryness, or stinging, particularly in leave-on or high-concentration formulations. |
| Eye irritation | Uncommon | Can cause transient stinging or irritation on accidental ocular contact in rinse-off products. |
| Concern over nitrosamine formation | Rare | Diethanolamine-based ingredients can react with nitrosating agents to form potentially carcinogenic nitrosamines; modern formulations limit this through manufacturing controls. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.