Vitamin B12 Dosage: How Much Should You Take per Day? - Healthline
网页2024年2月6日 · The recommended daily intake (RDI) for vitamin B12 for people over 14 is 2.4 micrograms (mcg) . However, you may want to take more or less, depending on your age, lifestyle, and specific...
Vitamin B-12 - Mayo Clinic
网页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.
VITAMIN B12 - Uses, Side Effects, and More - WebMD
网页People over 50 years of age are advised to eat foods fortified with vitamin B12 or to take a vitamin B12 supplement. 25-100 mcg daily has been taken by mouth to maintain vitamin B12...
Vitamin B12 - Consumer - Office of Dietary Supplements - Vitamin B12
网页Vitamin B12 is a nutrient that helps keep your body’s blood and nerve cells healthy and helps make DNA, the genetic material in all of your cells. Vitamin B12 also helps prevent megaloblastic anemia, a blood condition that makes people tired and weak. How much vitamin B12 do I need? The amount of vitamin B12 …
How Much Vitamin B12 Is Too Much? - Healthline
网页2023年2月24日 · While megadoses of up to 2,000 mcg are considered safe in treating B12 deficiency, it’s always best to avoid excessive amounts of any vitamin, especially when it’s not needed.
How Much Vitamin B12 Should I Take Per Day? - GoodRx
网页2023年9月8日 · In most cases, your daily diet provides enough vitamin B12. Most adults and children get between 4 mcg to 6 mcg per day. Vitamin B12 in your diet comes from animal sources (such as chicken, milk, and eggs) as well as …
Supplementing Vitamin B12 - NutritionFacts.org
网页2020年1月1日 · For adults under age 65, the easiest way to get B12 is to take at least one 2,000 mcg supplement each week or a daily dose of 50 mcg. Note that these doses are specific to cyanocobalamin, the preferred supplemental form of vitamin B12, as there is insufficient evidence to support the efficacy of the other forms, like methylcobalamin.
Vitamin B12 - Health Professional Fact Sheet
网页Vitamin B12 levels are higher, generally 50–500 mcg, in supplements containing vitamin B12 with other B-complex vitamins and even higher, typically 500–1,000 mcg, in supplements containing only vitamin B12. The most common form of vitamin B12 in dietary supplements is cyanocobalamin [1, 3, 23, 24].
Vitamin B-12 (Cobalamin) for Fatigue, Memory Loss, Weakness - WebMD
网页2023年3月15日 · Low vitamin B-12 can cause fatigue, weakness, memory loss, and other problems with the nervous system. WebMD explains how and when to take a B-12 supplement.
Tips to Manage Vitamin B12 for Older Adults - WebMD
网页2023年4月7日 · Healthy Aging Guide. What to Know About Vitamin B12 Dosage for Older Adults. Medically Reviewed by Carmelita Swiner, MD on April 07, 2023. Written by WebMD Editorial Contributor. What Does...