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The recommended daily intake of vitamin C is 90 milligrams for men and 75 milligrams for women, according to the National Institutes of Health. Children need less. Children need less.
But people with a vitamin B12 deficiency may see a metabolism boost. 2. Vitamin D. Vitamin D is present in a limited number of foods—fatty fish and cod liver oil are some of the best food sources.
Vitamin C supplements among other dietary supplements at a US drug store. Vitamin C has a definitive role in treating scurvy, which is a disease caused by vitamin C deficiency. Beyond that, a role for vitamin C as prevention or treatment for various diseases is disputed, with reviews often reporting conflicting results.
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]
Second, the adult tablet contains 1 g of vitamin C, and the directions for use advise taking 1 tablet at the first sign of a cold and repeating the dose every 3 hours as necessary, but no more than three servings a day. Vitamin C in doses higher than 1 g increases oxalate and urate excretion and may cause kidney stones. [11]
Just one lemon’s worth of juice provides 21% of your daily vitamin C — which is key to a strong and healthy immune system. Lemons are also rich in fiber, antioxidants, potassium, calcium and ...