When was the last time you threw away hygiene and makeup products that you use in your bathroom? Do you know that all those products can go bad if you keep them too long? If you continue using them after their “official” lifespan is over, they will become ineffective or even start growing potentially harmful bacteria.

It’s especially dangerous to keep and continue using eye products (like mascara, eyeliner and others) if their lifespan is over, since these products can become really, really dangerous.

Huffingtonpost.com spoke to Dr. Jessica Krant, M.D., founder of Art of Dermatology in New York City, and made a list of hygiene and makeup products that have rather short lifespan and should be thrown away right past their expiry date.