How long do cosmetics last?

You may not be able to use eye make-up, such as mascara, eyeliner, and eye shadow for as long as other products. This is because of the risk of eye infection. Some experts recommend replacing mascara three months after purchase. If mascara becomes dry, throw it away. Don't add water or, even worse, saliva to moisten it. That will bring bacteria into the product.

You may also need to watch certain "all natural" products that contain substances taken from plants. These products may be more at risk for bacteria. Since these products contain no preservatives or have non-traditional ones, your risk of infection may be greater.

If you don't store these products as directed, they may expire before the expiration date. For example, cosmetics stored in high heat may go bad faster than the expiration date. On the other hand, products stored the way they should be can be safely used until they expire.