Can you use expired vitamin E?

It is not recommended to use expired vitamin E. Vitamin E is a chemically synthesized substance, for example, some vitamin E is extracted from biological, and these vitamin E have a preservation time, when used within the preservation period is safe, but when the preservation time has passed may lead to vitamin E deterioration. However, because it is impossible to determine whether it has deteriorated in daily life, if it has deteriorated and then used in fact can not play a role in health care, but on the contrary will also cause damage to the skin, so it is best not to use the expired vitamin E.