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  2. 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 ...

  3. Vitamin B12 - Wikipedia

    en.wikipedia.org/wiki/Vitamin_B12

    Vitamin B12, vitamin B-12, cobalamin ... the person's dietary intake is below recommended levels. Symptomatic vitamin deficiency is more ... Elderly people are often ...

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

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

    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. ... How much vitamin B12 ...

  5. The Supplements Doctors Actually Think You Should Take - AOL

    www.aol.com/supplements-doctors-actually-think...

    Vitamin B12 The body’s ability to absorb B12 often declines with age , and some medications commonly taken later in life—including proton pump inhibitors and the diabetes drug metformin—can ...

  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.

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