Do you have cosmetics in a drawer that you have owned forever? Can you remember when you last bought mascara? Using old or expired cosmetics can lead to bacterial infections and other health problems. Over time, cosmetics develop yeast, fungi, and bacteria growth on their surface. These are transferred to your skin anytime you apply your makeup. This guide will help you to determine how long to keep each piece of your cosmetic collection.

Foundation:This product usually only lasts a year. It is probably one of the ones you replace most often, since many people use it daily. If you notice any changes in color or consistency before a year, throw the remainder away.

Lipstick:This product is one of the longest lasting ones. Most lipsticks will last two or three years before they need to be replaced. A sure sign that you have had your lipstick too long is when it starts to smell bad.

Mascara:This product needs to be replaced every three to six months. Since it is applied to one of the most sensitive areas of your face, it is important to make sure that it clean and sanitary.

Eye and Lip Pencils:Pencils easily last three years. The best way to ensure that they remain safe to apply is to keep them well sharpened and store them with the cap on.

Powder, Blush, and Eye Shadow Compacts: These products last for two to three years. Always use a brush instead of your fingers to apply them. If you notice a color change, then it is time to buy a new compact.

Nail Polish:This product lasts for about two years. Shake before applying to mix the pigment that has separated. If you find that shaking does fully mix the product, it is time to purchase a new bottle.

Never share your makeup with anyone else, since bacteria from their face is then transferred to yours. Use makeup brushes instead of your finger to apply makeup, since you finger has bacteria on it that can be transferred to both your face and the makeup container. Storing your makeup in a cool, dry place (not in the bathroom) will help them last longer. Finally, if you notice any differences in the way your cosmetics looks, smell, or feel replace them.