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Recommendations for vitamin C intake by adults have been set by various national agencies: 40 mg/day: India National Institute of Nutrition, Hyderabad [15] 45 mg/day or 300 mg/week: the World Health Organization [16] 80 mg/day: the European Commission Council on nutrition labeling [17] 90 mg/day (males) and 75 mg/day (females): Health Canada ...
Vitamin C megadosage is a term describing the consumption or injection of vitamin C (ascorbic acid) in doses well beyond the current United States Recommended Dietary Allowance of 90 milligrams per day, and often well beyond the tolerable upper intake level of 2,000 milligrams per day. [1]
Vitamin B 12 ; Vitamin C (ascorbic acid and ascorbates) Vitamin D (calciferols) Vitamin E (tocopherols and tocotrienols) Vitamin K (phylloquinones, menaquinones, and menadiones) Some sources include a fourteenth, choline. [6] Vitamins have diverse biochemical functions. Vitamin A acts as a regulator of cell and tissue growth and differentiation.
The recommended adequate intake of sodium is 1,500 milligrams (3.9 g salt) per day, and people over 50 need even less." [ 13 ] The Daily Value for potassium, 4,700 mg per day, was based on a study of men who were given 14.6 g of sodium chloride per day and treated with potassium supplements until the frequency of salt sensitivity was reduced to ...
Tolerable upper intake levels (UL), to caution against excessive intake of nutrients (like vitamin A and selenium) that can be harmful in large amounts. This is the highest level of sustained daily nutrient consumption that is considered to be safe for, and cause no side effects in, 97.5% of healthy individuals in each life stage and sex group.
Dietary components significantly influence iron absorption; tannins and polyphenols in tea and coffee inhibit it, while Vitamin C enhances it. However, the interaction between iron and vitamin C can generate free radicals, particularly in cases of iron overload. In iron deficiency, vitamin C aids absorption.