Origin Tocopherol naturally occurs in grains, nuts, plant oils, seeds, eggs, and milk. Tocopherol or E 306 is sensitive to light (therefore, plant oils should always be stored in dark conditions), but it is heat stable. The human body requires 4 mg of Vitamin E per day. If this vitamin is lacking in the body, deficiency symptoms such as dry skin, poor wound healing, and fatigue can occur. Since Vitamin E is also involved in regulating the glands, it has long been considered a "fertility vitamin." Use For industrial use of Tocopherol as food additive E 306, it is usually obtained from seeds like wheat, soy, or corn. However, production using microorganisms or genetically modified microorganisms is also possible. E 306 is generally approved for all foods as an antioxidant, including for organic products. It is frequently used in infant formula, chewing gum, desserts, dressings, frying fats, or oils. It is also often used in dietary supplements. Risks The antioxidant E 306 can be considered safe. Generally, an overdose of Vitamin E (which then refers to amounts over 800 mg per day) can lead to problems with blood clotting as well as disturbances in thyroid function and digestion.