Vitamin C - Mayo Clinic
Aug 10, 2023 · Vitamin C is found in citrus fruits, berries, potatoes, tomatoes, peppers, cabbage, Brussels sprouts, broccoli and spinach. Vitamin C is also available as an oral supplement, typically in the form of capsules and chewable tablets. Most people get enough vitamin C from a healthy diet. Vitamin C deficiency is more likely in people who:
Too much vitamin C: Is it harmful? - Mayo Clinic
Apr 28, 2022 · The recommended daily amount for vitamin C is 75 milligrams (mg) a day for women and 90 mg a day for men. During pregnancy, 120 mg a day are recommended. The upper limit for all adults is 2,000 mg a day. Although too much dietary vitamin C is unlikely to be harmful, large doses of vitamin C supplements might cause: Diarrhea; Nausea; Vomiting ...
Vitamin B-12 - Mayo Clinic
Jun 28, 2024 · The recommended daily amount of vitamin B-12 for adults is 2.4 micrograms (mcg). Most people can get enough vitamin B-12 in the foods they eat. But people who follow a vegetarian or vegan diet should eat nutritional yeast and other foods fortified with vitamin B-12. Or they can take a low-dose multivitamin that includes 2.4 mcg of vitamin B-12.
Vitamin D - Mayo Clinic
Aug 10, 2023 · Vitamin D supplements are used to treat adults with severe vitamin D deficiency, resulting in loss of bone mineral content, bone pain, muscle weakness and soft bones (osteomalacia). Osteoporosis. Studies suggest that people who get enough vitamin D and calcium in their diets can slow bone mineral loss, help prevent osteoporosis and reduce bone ...
Ascorbic acid (oral route) - Mayo Clinic
Feb 1, 2024 · The daily amount of vitamin C needed is defined in several different ways. For U.S.— Recommended Dietary Allowances (RDAs) are the amount of vitamins and minerals needed to provide for adequate nutrition in most healthy persons.
High-dose vitamin C: Can it kill cancer cells? - Mayo Clinic
Dec 15, 2023 · Despite the lack of evidence, some alternative medicine practitioners continue to recommend high doses of vitamin C for cancer treatment. More recently, vitamin C given through a vein (intravenously) has been found to have different effects than vitamin C taken in pill form.
Zinc supplement (oral route, parenteral route) - Mayo Clinic
To prevent deficiency, the amount taken by mouth is based on normal daily recommended intakes (Note that the normal daily recommended intakes are expressed as an actual amount of zinc. The dosage form [e.g., zinc gluconate, zinc sulfate] has a different strength): For the U.S. Adult and teenage males—15 milligrams (mg) per day.
Methenamine (oral route) - Mayo Clinic
Feb 1, 2024 · Children up to 6 years of age—Dose is based on body weight. The usual dose is 18.3 mg per kilogram (kg) (8.3 mg per pound) of body weight four times a day. Take after meals and at bedtime. Children 6 to 12 years of age—500 mg four times a …
Beta carotene (oral route) - Mayo Clinic
Feb 1, 2024 · Adults and teenagers—75 to 180 mg of beta-carotene (the equivalent of 125,000 to 300,000 Units of vitamin A activity) a day. Children—30 to 150 mg of beta-carotene (the equivalent of 50,000 to 250,000 Units of vitamin A activity) a day. If you have high blood levels of vitamin A, your body will convert less beta-carotene to vitamin A.
Iron supplement (oral route, parenteral route) - Mayo Clinic
Cereals, beans, and some vegetables contain poorly absorbed (nonheme) iron. Foods rich in vitamin C (e.g., citrus fruits and fresh vegetables), eaten with small amounts of heme iron-containing foods, such as meat, may increase the amount of nonheme iron absorbed from cereals, beans, and other vegetables.