Ingredient
Cocamidopropyl betaine
Low concern
Not a red flag on its own. Pay attention if it shows up often.
What it is
A common mild-ish foam helper from coconut.
Why it’s used
Lather.
What to know
A contact allergen for some. Middle of the road.
Who should skip
If you’ve reacted to ‘cocamidopropyl betaine’ on a patch test.
A gentler swap
Decyl glucoside.
You’ll see it in
Shampoo and body wash.