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 ...
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.
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.
Hemochromatosis - Diagnosis and treatment - Mayo Clinic
2025年1月9日 · Don't take vitamin C supplements. Vitamin C increases absorption of iron. There's usually no need to restrict vitamin C in your diet, however. Stay away from alcohol. Alcohol greatly increases the risk of liver damage in people with hemochromatosis. If you have hemochromatosis and you already have liver disease, avoid alcohol completely.
Niacin overdose: What are the symptoms? - Mayo Clinic
2024年5月14日 · Niacin. Natural Medicines. https://naturalmedicines.therapeuticresearch.com. Accessed Dec. 4, 2023. Rakel D, et al., eds. Nutrition and nutritional supplements in the ...
Vitamin B-6 - Mayo Clinic
2023年8月10日 · A vitamin B-6 deficiency is usually coupled with deficiency in other B vitamins, such as folic acid (vitamin B-9) and vitamin B-12. The recommended daily amount of vitamin B-6 for adults 50 and younger is 1.3 milligrams. After age 50, the recommended daily amount is 1.5 milligrams for women and 1.7 milligrams for men.