Vitamin C - Mayo Clinic
网页2023年8月10日 — Vitamin C (ascorbic acid) is a nutrient your body needs to form blood vessels, cartilage, muscle and collagen in bones. Vitamin C is also vital to your body's healing process. Vitamin C is an antioxidant that helps protect your cells against the effects of free radicals — molecules produced when your body breaks down food or is exposed …
Too much vitamin C: Is it harmful? - Mayo Clinic
网页2022年4月28日 — 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. Heartburn. Stomach (abdominal) cramps. Headache. Remember, for most people, a healthy diet provides enough vitamin C.
Vitamin E - Mayo Clinic
网页2023年8月10日 — Vitamin E is a nutrient that's important to vision, reproduction, and the health of your blood, brain and skin. Vitamin E also has antioxidant properties. Antioxidants are substances that might protect your cells against the effects of free radicals — molecules produced when your body breaks down food or is exposed to tobacco smoke and radiation.
Vitamin B-6 - Mayo Clinic
网页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.
High-dose vitamin C: Can it kill cancer cells? - Mayo Clinic
网页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. Subsequent well-designed, randomized, controlled ...
Ascorbic Acid (Oral Route) Side Effects - Mayo Clinic
网页2024年8月1日 — Vitamin C also strengthens blood vessel walls. Lack of vitamin C can lead to a condition called scurvy, which causes muscle weakness, swollen and bleeding gums, loss of teeth, and bleeding under the skin, as well as …
Vitamin A - Mayo Clinic
网页Vitamin A (retinol, retinoic acid) is a nutrient important to vision, growth, cell division, reproduction and immunity. Vitamin A also has antioxidant properties. Antioxidants are substances that might protect your cells against the effects of free radicals — molecules produced when your body breaks down food or is exposed to tobacco smoke ...
Do the benefits of vitamin C include improved mood? - Mayo Clinic
网页2022年10月8日 — Some studies have shown that people who have lower than normal vitamin C levels found that their mood improved after they received vitamin C. But even for people who aren't known to have low vitamin C levels, taking a vitamin C supplement might help mood. In some studies, participants reported that vitamin C lowered their anxiety levels.
Vitamin D - Mayo Clinic
网页2023年8月10日 — Vitamin D is a nutrient your body needs for building and maintaining healthy bones. That's because your body can only absorb calcium, the primary component of bone, when vitamin D is present. Vitamin D also regulates many other cellular functions in your body. Its anti-inflammatory, antioxidant and neuroprotective properties support …
Vitamin K (Class) (Oral Route, Parenteral Route) - Mayo Clinic
网页2024年9月1日 — Vitamins are compounds that you must have for growth and health. They are needed in only small amounts and usually are available in the foods that you eat. Vitamin K is necessary for normal clotting of the blood. Vitamin K is found in various foods including green leafy vegetables, meat, and dairy products. If you eat a balanced diet …