Facial cosmetics are very delicate and can do more harm than good if you do not keep track of their expiration date. Yes, cosmetics have an expiration date, just as medical products do and you should remove them from your cosmetics bag as soon as this date is past.
This sounds simple enough, but there is a problem that many people, especially those who travel a lot, occasionally encounter. The problem is that there are no international standards for marking the expiration date, so the markings are different in Europe and in North America. So here is what you should know about the expiration of makeup:
Makeup expires more quickly in countries or states with a tropical climate.
If you want your cosmetics to last longer, then do not store them in the bathroom where there is moisture. Keep them in a cool dry place, preferably in a zip-lock bag outside the reach of oxygen, and do not use them with wet or dirty hands.
Mascara is a product that you should be extra careful with. Its shelf life is typically anywhere from 3 to 6 months. This is a product based on water, so it is a breeding ground for bacteria, which means that your mascara can go bad long before its 3 months are up. Avoid sharing cosmetics with your friends, especially the mascara.