Petroleum/PEG (PEG followed by a number)

What it’s used foR: Emmolient, humectant

Where it can be found: various cosmetics and skin care products

Why we don’t use it: Petroleum ingredients have been shown to cause allergies and skin irritation like dermatitis. They are also comedogenic, so they are especially bad for those prone to breakouts.

See if your favourite products contain this harmful ingredient.