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  1. www.mayoclinic.org › drugs-supplements-vitamin-c › art-20363932Vitamin C - Mayo Clinic

    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 to ...

  2. 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.

  3. 2022年12月15日 · 所有成人每天最多摄入 2000 毫克(mg)。. 尽管过多的膳食维生素 C 不太可能有害,但大剂量的维生素 C 补充剂可能导致:. 腹泻. 恶心. 呕吐. 胃灼热. 胃(腹部)痛性痉挛. 头痛. 请注意,对于大多数人来说,健康的饮食即可提供足量维生素 C。.

  4. 2024年7月12日 · The following might help you feel better: Drink plenty of fluids. Water, juice, clear broth or warm lemon water with honey helps loosen stuffiness, called congestion. These also help prevent losing too much fluid, called dehydration. Don't drink alcohol, coffee and sodas with caffeine. They can make dehydration worse. Rest.

  5. www.mayoclinic.org › es › drugs-supplements-vitamin-cVitamina C - Mayo Clinic

    2023年8月10日 · Descripción general. La vitamina C (ácido ascórbico) es un nutriente que el cuerpo necesita para formar vasos sanguíneos, cartílagos, músculos y colágeno en los huesos. La vitamina C también es vital para el proceso de curación del cuerpo. La vitamina C es un antioxidante que protege las células contra los efectos de los radicales ...

  6. 2023年8月10日 · 维生素 C 是一种抗氧化剂,可帮助保护细胞免受自由基的影响,其中自由基是当机体分解食物或接触烟草烟雾和来自太阳、X 线或其他来源的射线时产生的分子。. 自由基可能会在预防心脏病、癌症及其他疾病方面发挥作用。. 维生素 C 还可以帮助身体吸收和存储 ...

  7. 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 ...

  8. 18世纪远航时期,很多人长期缺乏维生素C,会发生精神不振、牙龈出血、牙齿掉落、皮肤出血甚至肝肾功能衰竭而死亡等悲剧,及时补充维生素C就能预防坏血病,因为人体不能合成维生素C,必须靠食物供给,所以维生素C也被称之为抗坏血酸。. 现代人已经不大 ...

  9. (补充:vitamin中文的音译为维他命,而维生素一词是由英国传教士医生高似兰翻译过来的)很快,在1910年后,维生素不断被发现,1913年发现Vitamin A,1920年发现Vitamin C,Vitamin D,Vitamin B2,1922年发现Vitamin E,1929年发现Vitamin K等等。

  10. www.mayoclinic.org › drugs-supplements-vitamin-b12 › art-20363663Vitamin B-12 - Mayo Clinic

    2024年6月28日 · 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.

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