Salicylic acid
This mild acid is used to treat certain skin disorders, including acne, and you can find it in a number of skin products, such as cleansers and toners. It can penetrate facial oils to get deep into pores and clean out dead skin cells. Salicylic acid is in the aspirin family, so it can also help reduce inflammation or redness. BHA, or beta hydroxy acid, is a form of salicylic acid and is used in some topical exfoliants to reverse signs of aging.
But salicylic acid is another no-no for pregnant women. High doses of the acid in itsoralform have been shown in studies to cause birth defects andvarious pregnancy complications.
I'm probably being overly cautious as it doesn't actually say breastfeeding but pregnancy.