Cetearyl alcohol, oleyl alcohol, and other types can trigger the development of white heads and blackheads, the first lesions in acne. Even worse, alcohols are irritants and can dry out the skin. That irritation¹ can trigger flare-ups, which make it more difficult to use acne-fighting medications, since those too can be drying, explains Melisa Piliang, MD, a dermatologist² at the Cleveland Clinic.

 

 

Used as an emollient³ to soften⁴ the skin, lanolin and its derivatives⁶ (like acetylated lanolin) can also lead to breakouts.

 

Cyclopentasiloxane, cyclohexasiloxane, and other forms of silicone such as dimethicone, phenyl, and trimethicone are a no-no for acne-prone skin, according to Debra Jaliman, MD, an assistant professor of dermatology at Mount Sinai School of Medicine in New York City and author of Skin Rules. Another substance to avoid: petrolatum, which is sometimes found in moisturizing foundations, she says.

 

 

Some foundations include oil, such as mineral oil, coconut⁷ oil, and cocoa butter. But oils are not recommended for anyone with acne, cautions Dr. Piliang. Adding extra oil to already oily skin can clog⁸ your pores even more.

 

Fatty acids: The ingredient ehylhexyl palmitate, a derivative⁵ of palm oil, may also be responsible for makeup-induced acne woes⁹. "Keep in mind that 'natural ingredients' can be comedogenic as well," says Dr. Piliang.

点击收听单词发音