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2. Vitamin B12 - Wikipedia

   en.wikipedia.org/wiki/Vitamin_B12

   [42] [39] Vitamin B 12 is not one of the supplements recommended by the World Health Organization for healthy women who are pregnant, [10] however, vitamin B 12 is often suggested during pregnancy in a multivitamin along with folic acid [43] [44] especially for pregnant mothers who follow a vegetarian or vegan diet.

3. Vitamin B12 Is a Power Nutrient. Here's How to Know If ... - AOL

   www.aol.com/vitamin-b12-power-nutrient-heres...

   The National Institutes of Health recommends that the average man consume a mere 2.4 micrograms a day, which is actually the lowest daily recommended dose of any vitamin. “Vitamin B12 ...

4. These High-Quality Vitamin B12 Supplements Can Help ... - AOL

   www.aol.com/high-quality-vitamin-b12-supplements...

   Again, the daily recommended dietary allowance of vitamin B12 for most adults is 2.4 micrograms, stretching up to 2.6 and 2.8 micrograms if you’re pregnant or nursing.

5. Is It Possible to Take Too Much B12? Here's What ... - AOL

   www.aol.com/lifestyle/possible-too-much-b12-here...

   Registered dietitians explain what vitamin B12 is, how much you need, ... Registered dietitians explain what vitamin B12 is, how much you need, and the potential side effects of taking too much.

6. Vitamin B12 deficiency - Wikipedia

   en.wikipedia.org/wiki/Vitamin_B12_deficiency

   Vitamin B 12 deficiency is preventable with supplements, which are recommended for pregnant vegetarians and vegans, and not harmful in others. [2] Risk of toxicity due to vitamin B 12 is low. [2] Vitamin B 12 deficiency in the US and the UK is estimated to occur in about 6 percent of those under the age of 60, and 20 percent of those over the ...

7. Human nutrition - Wikipedia

   en.wikipedia.org/wiki/Human_nutrition

   The Recommended Dietary Allowance (RDA) for vitamin B12 is 0.9-2.4 μg/day, while the estimated average requirement in the U.S. and Canada is 0.7-2 μg/day. Elderly individuals with plasma vitamin B12 levels below 148 pmol/L are considered severely deficient, and those with levels between 148 and 221 pmol/L are marginally deficient.