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What is the RDA for vitamin B12 in mcg?
The typical general supplemental dose of vitamin B12 is 1-25 mcg per day: The recommended dietary allowances (RDAs) of vitamin B12 are: 1.8 mcg; older children and adults, 2.4 mcg; pregnant women, 2.6 mcg; and breast-feeding women, 2.8 mcg.
Is it OK to take 25 mcg of B12 a day?
The government guidelines recommend a daily intake of 2.4 micrograms (mcg) of B12 to prevent deficiency, but for optimal health and disease prevention, we recommend a daily dose of 25 mcg. To get this much — particularly if you’re a strict vegetarian — you’ll probably need to rely on supplements or fortified foods.
How can I get 2.4 mcg of B12?
Top foods with B12 The average adult should get 2.4 micrograms (mcg) of vitamin B12 a day, according to the National Institutes of Health. Here are some of the best foods with B12: Clams, 3 ounces: 84 mcg. 100\% fortified breakfast cereal (check the label), 1 serving: 6.
How many 1000 mcg B12 can I take a day?
The recommended dose for treating vitamin B12 deficiency is 1000 mcg daily. The recommended dose for preventing vitamin B12 deficiency is 1500 mg or 2500 mcg (sublingual tablets) daily. The dose for treating hyperhomocysteinemia is 400 mg daily in combination with folic acid.
How much B12 should I take 1000 mcg?
What is the Recommended Dietary Allowance (RDI) for vitamin B12 (B12)?
For people over 14, the RDI for vitamin B12 is 2.4 mcg ( 1 ). Most people meet this requirement through diet.
How much vitamin B12 should an elderly person take?
In one 8-week study in 100 older adults, supplementing with 500 mcg of vitamin B12 were found to normalize B12 levels in 90\% of participants. Higher doses of up to 1,000 mcg (1 mg) may be necessary for some ( 10 ).
What is considered a high dose of vitamin B12?
A vitamin B12 dose of 1000 µg or more is considered high. This corresponds to over 40 000\% of the daily requirement of 2.5 µg officially recommended by the Institute of Medicine (IOM), which initially appears to be an enormous overdose.
How much vitamin B12 should a pregnant woman take?
Higher doses of up to 1,000 mcg (1 mg) may be necessary for some ( 10 ). Pregnant women have slightly higher vitamin B12 needs than the general population. ). ). Therefore, the RDI for vitamin B12 during pregnancy is 2.6 mcg. This level can be met through diet alone or with a prenatal vitamin ( 1 ). ). ).