Vitamin E deficiency and overdose
Vitamin E deficiency can be dangerous — and roughly 90 percent of the population is deficient in Vitamin E. A lack of vitamin E can cause nerve damage. On the other side of the coin, a higher dose of vitamin E, even in a natural supplement, can increase the risk of hemorrhagic stroke because it interrupts blood coagulation. It can also cause symptoms like headache, nausea, and fatigue.
The American Heart Association recommends getting plenty of Vitamin E from a well-balanced diet, but if deficiency is a problem, instead use supplements. Even if you choose a natural vitamin E supplier, it’s possible to overdose on supplements, so they should be avoided unless prescribed by your doctor.