[Normal human needs]
The recommended daily intake for adults is 8 ~10iu;
60% ~ 70% of daily intake will be excreted with excrement. Different from other fat-soluble vitamins, vitamin E has a short storage time in human body, which is the same as vitamins B and C; Medical experts believe that the common oral dose of vitamin E should be 10 to 100 mg each time, 1 3 times a day. Large dose means more than 400 mg per day, and long-term use means continuous use for more than 6 months. Vitamin E contained in the general diet can fully meet the needs of the human body. Therefore, it is not only unnecessary for the elderly to take vitamin E for a long time, but also unsafe and has side effects.
Too much
Taking large doses of vitamin E for a long time can cause various diseases. Among them, thrombophlebitis or pulmonary embolism, or both occur at the same time, because large doses of vitamin E can cause platelet aggregation and formation; When blood pressure rises, blood pressure can be reduced or returned to normal after drug withdrawal; Breast hypertrophy can occur in both men and women; Headache, dizziness, dizziness, blurred vision, muscle weakness;
Chapped skin, cheilitis, angular stomatitis, urticaria; Symptoms of diabetes or angina pectoris are obviously aggravated; Hormone metabolism disorder, prothrombin reduction; Blood cholesterol and triglyceride levels increased; Platelets increase, vitality increases, and immune function decreases.
Vitamin e poisoning
Adults take relatively large doses of vitamin E(D-α- tocopherol 400~800mg/d) for several years without obvious damage. Those who take 800~3200mg/d occasionally have muscle weakness, fatigue, vomiting and diarrhea. The most obvious toxic effect of vitamin E > 1000 mg/d is to antagonize and enhance the effect of vitamin K.