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6% (< 60 years old), 20% (> 60 years old) [ 4 ] Vitamin B12 deficiency, also known as cobalamin deficiency, is the medical condition in which the blood and tissue have a lower than normal level of vitamin B 12. [ 5 ] Symptoms can vary from none to severe. [ 1 ] Mild deficiency may have few or absent symptoms. [ 1 ]
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 so as to identify amounts that will cover people with higher than average requirements. RDA for pregnancy equals 2.6 μg/day. RDA for lactation equals 2.8 μg/d.
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 ...
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If there are other, reversible causes of low vitamin B 12 levels, the cause must be treated. [102] Vitamin B 12 deficiency anemia is usually easily treated by providing the necessary level of vitamin B 12 supplementation. [103] The injections are quick-acting, and symptoms usually go away within one to two weeks. [103]
While lower levels of vitamin B12 are associated with higher BMI and body fat, taking vitamin B12 supplements didn’t change body composition over the long term. More research is needed on the ...
Serum vitamin B12. Serum vitamin B12 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]
Hydroxocobalamin is the natural form of vitamin B 12 and a member of the cobalamin family of compounds. [6][7] It is found in both raw and cooked beef, together with other cobalamins. [8] Hydroxocobalamin, or another form of vitamin B 12, are required for the body to make DNA. [7]