Too much vitamin C: Is it harmful? - Mayo Clinic
2022年4月28日 · 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 C - Mayo Clinic
2023年8月10日 · 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:
Vitamin D toxicity: What if you get too much? - Mayo Clinic
2022年3月22日 · Vitamin D toxicity, also called hypervitaminosis D, is a rare but potentially serious condition that occurs when you have excessive amounts of vitamin D in your body. Vitamin D toxicity is usually caused by large doses of vitamin D supplements — not by diet or sun exposure. That's because your body regulates the amount of vitamin D produced ...
High-dose vitamin C: Can it kill cancer cells? - Mayo Clinic
2023年12月15日 · Interest in using very high doses of vitamin C as a cancer treatment began as long ago as the 1970s when it was discovered that some properties of the vitamin may make it toxic to cancer cells. Initial studies in humans had promising results, but these studies were later found to be flawed.
A Supplement That May Block The Toxic Effects of Alcohol
2017年9月26日 · L-cysteine, vitamin C, and vitamin B 1 are purported to help. At supplement doses, they are cheap and harmless at worst. At best: Goodbye, acetaldehyde toxicity; hello, restful sleep. About 200 mg ...
Do the benefits of vitamin C include improved mood? - Mayo Clinic
2022年10月8日 · In some studies, participants reported that vitamin C lowered their anxiety levels. More research is needed. But in the meantime, eat plenty of fruits and vegetables rich in vitamin C, such as oranges and red peppers. If you also take a supplement, try not to exceed the upper limit of 2,000 milligrams of vitamin C a day.
Vitamin B-12 - Mayo Clinic
2024年6月28日 · Taking vitamin B-12 with vitamin C might reduce the available amount of vitamin B-12 in your body. To avoid this interaction, take vitamin C two or more hours after taking a vitamin B-12 supplement. Your doctor might recommend changing drugs or timing doses to offset any potential interactions.
Management of Vitamin D Deficiency Reviewed - Medscape
2009年11月9日 · To prevent vitamin D deficiency, adults with inadequate sun exposure should have vitamin D intake of 400 to 600 IU per day (level of evidence, C). Adults with vitamin D deficiency, except for ...
Excess Vitamin D Linked to Kidney Damage - Medscape
2019年4月8日 · 2010 guidelines from Osteoporosis Canada recommend 400–1000 IU of vitamin D daily for most adults, and 800–2000 IU daily for older adults and those at increased risk for osteoporosis. The US ...
Vitamin D - Mayo Clinic
2023年8月10日 · 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 ...