METABOLISM PEARLS #15: VITAMIN E AND THE ANTIOXIDANT NETWORK – Vitamin E is found in the cell membranes of many foods and in your human cells where it is part of what is called the Antioxidant Network. Fats you eat especially polyunsaturated hidden fats in processed foods get oxidized when exposed to oxygen in the air. Nuts and potato chips left out in the air get a funny smell as the fats spoil. Inside all the cells of your body, it is important to prevent oxidation. Carotenes like Lutein we discussed last time and Vitamin E capture the extra electrons created by oxidation and get oxidized. Vitamin C then picks up the electron from vitamin E restoring its ability to be an antioxidant again. Then Thiols like glutathione and alpha-lipoic acid rescue Vitamin C and finally the extra electrons are handled by enzymes like Superoxide Dismutase which are there to quench the oxygen radicals coming from the Mitochondria in the process of using Oxygen to turn food into energy. The requirement for Vitamin E is only 15 mg and it is found in many foods rich in healthy fats like nuts and avocados. Deficiency in mice leads to infertility but human deficiencies are either non-existent or not well-documented. There is one case of a man on blood thinners receiving 1200 mg of Vitamin E and bleeding which is why the upper limit is set at 1200 mg. However, vitamin E is safe at doses of 200 mg and is a popular supplement. There are actually eight forms of Vitamin E (4 tocopherol and 4 tocotrienols). They are carried to the liver by a transport protein in the blood specific for one form (alpha tocopherol) which is the major form found in multivitamins and dietary supplements. Vitamin E oil is good for the skin and is part of Outer Nutrition to maintain good skin tone. It is also in your Protein-Rich Shake along with other vitamins you need every day!! Next time I will discuss Vitamin K for blood clotting and bone health-So stay tuned !!!
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