Does Makeup Really Expire?

Health Risks of Using Expired Makeup

The main risks of using expired makeup are microbial contamination and ingredient degradation, says Karp. Over time, key ingredients break down, including SPF, preservatives that prevent bacterial growth, and emulsifiers that keep ingredients blended. As these ingredients lose their effectiveness, the product becomes less stable and potentially harmful to skin. “This can lead to irritation, allergic reactions, breakouts, or infection, depending on the product and where it’s used,” Karp says.

Skin Irritation and Allergic Reactions

The presence of bacteria in makeup can be harsh on skin, causing skin irritation and allergic reactions. This is especially common in people with eczema (a chronic inflammatory condition that causes dry, itchy skin), rosacea (a chronic skin condition causing redness and acnelike bumps), or sensitive skin. “These patients are more vulnerable because the skin barrier is already compromised,” Karp says. (The skin barrier is the protective outer layer of skin that keeps moisture in and harmful bacteria out.)

Possible symptoms include stinging and burning, contact dermatitis (an itchy rash caused by an irritant on the skin), and rosacea flare-ups. If you have sensitive skin, eczema, or rosacea, Karp recommends being even more vigilant about tossing old cosmetics.

Acne and Clogged Pores