Throw skincare products away after one year.
When in doubt, toss it.
If a skincare product smells or looks funny, toss it.
Lotions and creams in tubes last longer than products in widemouthed jars.
Keep containers closed; air speeds up products degradation and bacteria sneak in.
Never add water or saliva to a product that has dried out; bacteria can br introduced.
Keep makeup out of sunlight.
Lola Longe, Master Makeup Artist, Houston, TX