在新选项卡中打开链接
  1. 维生素B12
    维生素B12化合物
    副作用警告相互作用剂量优惠券适应症预防措施成分
     
  2. Healthline
    https://www.healthline.com/nutrition/vitamin-b12-dosage

    Vitamin B12 Dosage: How Much Should You Take per Day?

    • Learn about the importance, sources, and recommended intake of vitamin B12 for different people and situations. Find out how to avoid deficiency, side effects, and overdose of this essential nutrient.… 展开

    Overview

    Doctors may recommend vitamin B12 supplements for those with certain health conditions or dietary restrictions. The dosage can vary based on factors including age, sex, and m… 展开

    Healthline
    Why do you need vitamin B12?

    Vitamin B12 is an essential nutrient that plays a critical role in several of your body’s p… 展开

    Healthline
    Suggested dosages

    The recommended daily intake (RDI) for vitamin B12 for people over 14 is 2.4 micrograms (mcg) (1).
    However, you may want to take more or less, depending … 展开

    Healthline
    Potential side effects

    Vitamin B12 is a water-soluble vitamin, meaning that your body excretes what you don’t need in your urine.
    Because it’s relatively safe, no tolerable upper intake lev… 展开

    Healthline
    The bottom line

    Vitamin B12 is a nutrient that plays many essential roles in your body.
    The RDA for vitamin B12 ranges from 2.4 mcg for adults to 2.8 mcg for people who are breastfeeding. … 展开

    Healthline
    反馈
    目录
    Overview
    Why do you need vitamin B12?
    Suggested dosages
    Potential side effects
    The bottom line
     
  1. 2.4 micrograms
    • 根据 2 个来源
    The recommended daily intake (RDI) for vitamin B12 for people over 14 is 2.4 micrograms (mcg) (1). However, you may want to take more or less, depending on your age, lifestyle, and specific situation.

    Vitamin B12 Dosage: How …

    healthline.com
    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.

    Vitamin B-12 - Mayo Clinic

    mayoclinic.org
  2. 其他用户还问了以下问题
    How much vitamin B12 should I take a day?
    UL: A Tolerable Upper Intake Level (UL) is the maximum daily dose unlikely to cause adverse side effects in the general population. No upper limit has been set for vitamin B12, as there is no established toxic level. However, some evidence suggests that supplements of 25 mcg per day or higher may increase the risk of bone fractures.

    Vitamin B12 - The Nutrition Source

    nutritionsource.hsph.harvard.edu
    How much vitamin B12 is in a supplement?
    The amount of vitamin B12 in supplements varies widely. Some provide doses of vitamin B12 that are much higher than recommended amounts, such as 500 mcg or 1,000 mcg, but your body absorbs only a small percentage of it. These doses are considered safe. Check the Supplement Facts label to see how much vitamin B12 a supplement contains.

    Vitamin B12 - Consumer - Office of Dietary Supplements - Vitamin B12

    ods.od.nih.gov
    Should you take a vitamin B12 supplement?
    “Unless you have a B12 deficiency or have identified a risk factor for deficiency (like following a vegan diet or having a malabsorption issue), there’s no need to take a vitamin B12 supplement. Instead, include food sources of vitamin B12 in your diet,” says Taylor.

    Vitamin B12 Benefits and Best Sources - Cleveland Clinic Health Essentials

    health.clevelandclinic.org
    What is a Daily Value (DV) for vitamin B12?
    *DV = Daily Value. FDA developed DVs to help consumers compare the nutrient contents of foods and dietary supplements within the context of a total diet. The DV for vitamin B12 is 2.4 mcg for adults and children age 4 years and older . FDA does not require food labels to list vitamin B12 content unless vitamin B12 has been added to the food.

    Vitamin B12 - Health Professional Fact Sheet

    ods.od.nih.gov
    Is vitamin B12 a good nutrient?
    The easiest: Vitamin B12 is an essential nutrient that helps your body with creating healthy red blood cells and improving energy levels. way to take in more vitamin B12 is by enriching your diet with certain foods, not supplements.

    Vitamin B12 Benefits and Best Sources - Cleveland Clinic Health Essentials

    health.clevelandclinic.org
    How much vitamin B12 should a vegetarian take?
    There are currently no government recommendations for B12 supplement dosages for vegetarians. However, one study suggests that doses up to 6 mcg of vitamin B12 per day may be appropriate for vegans (19).

    Vitamin B12 Dosage: How Much Should You Take per Day? - Healthline

    healthline.com
    反馈
  3. Mayo Clinic
    https://www.mayoclinic.org/drugs-supplements...

    Vitamin B-12 - Mayo Clinic

  4. Office of Dietary Supplements (ODS)
    https://ods.od.nih.gov/factsheets/VitaminB12-Consumer

    Vitamin B12 - Consumer - Office of Dietary Supplements - Vitamin …

  5. Office of Dietary Supplements (ODS)
    https://ods.od.nih.gov/factsheets/Vitaminb12-HealthProfessional

    Vitamin B12 - Health Professional Fact Sheet

  6. Cleveland Clinic
    https://health.clevelandclinic.org/vitami…

    Vitamin B12 Benefits and Best Sources - Cleveland …

    2022年6月8日 · Learn how vitamin B12 helps with red blood cells, brain function, energy and vision, and what foods are rich in this essential nutrient. Find out who is at risk of vitamin B12 deficiency and how to prevent it.

  7. Everlywell
    https://www.everlywell.com/blog/vitamin…

    How much vitamin B12 should I take daily? - Everlywell

    2024年1月24日 · Learn how much vitamin B12 you need daily based on your age, biological sex, diet and health status. Find out the benefits of B12, the sources of B12 and how to test your B12 levels.

  8. harvard.edu
    https://nutritionsource.hsph.harvard.edu/…

    Vitamin B12 - The Nutrition Source

    Learn about vitamin B12, its functions, sources, recommended amounts, and signs of deficiency and toxicity. Find out how vitamin B12 may affect cardiovascular disease and cognitive function, and who may benefit from …

  9. Office of Dietary Supplements (ODS)
    https://ods.od.nih.gov/pdf/factsheets/VitaminB12-Consumer.pdf
    [PDF]

    Vitamin B12 Fact Sheet for Consumers - Office of Dietary …

  10. Healthline
    https://www.healthline.com/health/vita…

    Vitamin B12: What Are the Health Benefits?

    2023年11月6日 · For most adults, the recommended daily intake of vitamin B12 is 2.4 micrograms (mcg). However, the recommendation is slightly higher for people who are pregnant or nursing, at 2.6 mcg per...

  11. NHLBI, NIH
    https://www.nhlbi.nih.gov/health/anemia/vitamin...

    Vitamin B12–Deficiency Anemia - NHLBI, NIH