Aka: butylparaben, methylparaben and propylparaben.
Found in: Shampoos, commercial hair dyes and other topical products.
Used to: Prolong product shelf life in poducts with a significant amount of water as they discourage the growth of microbes.
Could be harmful: They have estrogen-like properties and could contribute to the cause of breast cancer.
Ingredients to look for: Ethylparaben, butylparaben, methylparaben, propylparaben, isobutylparaben, isopropylparaben, other ingredients ending in –paraben