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2. The Top Signs You Have a Vitamin B12 Deficiency - AOL

   www.aol.com/top-sign-vitamin-b12-deficiency...

   Adults need about 2.4 micrograms of B12 a day (that much can be found in one portion of salmon, canned tuna or ground beef), with pregnant and nursing women needing slightly more (2.6 and 2.8 mcg ...

3. Vitamin B12 deficiency - Wikipedia

   en.wikipedia.org/wiki/Vitamin_B12_deficiency

   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 age of 60. [4] In Latin America, about 40 percent are estimated to be affected, and this may be as high as 80 percent in parts of Africa and Asia. [1]

4. Vitamin B12 - Wikipedia

   en.wikipedia.org/wiki/Vitamin_B12

   The US National Academy of Medicine updated estimated average requirements (EARs) and recommended dietary allowances (RDAs) for vitamin B 12 in 1998. [6] The EAR for vitamin B 12 for women and men ages 14 and up is 2.0 μg/day; the RDA is 2.4 μg/d. RDA is higher than EAR to identify amounts that will cover people with higher-than-average ...

5. Pernicious anemia - Wikipedia

   en.wikipedia.org/wiki/Pernicious_anemia

   Pernicious anemia due to autoimmune problems occurs in about one per 1000 people in the US. Among those over the age of 60, about 2% have the condition. [8] It more commonly affects people of northern European descent. [2] Women are more commonly affected than men. [15] With proper treatment, most people live normal lives. [5]

6. Can you take too much vitamin B12? How to find your proper ...

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7. Serum vitamin B12 - Wikipedia

   en.wikipedia.org/wiki/Serum_vitamin_B12

   Serum vitamin B 12 is a medical laboratory test that measure vitamin B 12 only in the blood binding to both transcobalamins. [1] Most of the time, 80–94% of vitamin B 12 in the blood binds to haptocorrin, while only 6–20% is binds to transcobalamin ll. [2] Only transcobalamin ll is "active" and can be used by the body. [1]

8. A Pill For Longer, Thicker Hair? These Are Worth Your Money ...

   www.aol.com/20-best-supplements-hair-growth...

   One study from the Journal of Clinical and Aesthetic Dermatology found that 79.5 percent of premenopausal women aged 20 to 45 ... B12, which keeps the scalp and follicles nourished in order to ...

9. Dietary Reference Intake - Wikipedia

   en.wikipedia.org/wiki/Dietary_Reference_Intake

   Estimated Average Requirements (EAR), are expected to satisfy the needs of 50% of the people in that age group based on a review of the scientific literature. Recommended Dietary Allowances (RDA), the daily dietary intake level of a nutrient considered sufficient by the Food and Nutrition Board of the Institute of Medicine to meet the ...