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Is the Recommended Daily Allowance for Vitamin B12 1000 Mcg?

By Janet Renee, MS, RD

Your body needs different nutrients in varying amounts, which a well-balanced diet is designed to provide. When it comes to B-12, one of eight B-complex vitamins, your body only requires a small amount to remain healthy. Vitamin B-12 plays a role in nerve function and DNA production. While the typical diet supplies 5 to 15 micrograms of B-12, according to Drugs.com, health stores also offer B-12 in various amounts. High-potency B-12 is available in 500, 1,000 and 1,500 micrograms. Discuss it with your physician before taking high-potency B-12.

How Much and Where to Get It

The average daily recommended intake for B-12 is actually only 2.4 micrograms. You get this from animal foods such as eggs, milk, fish, meat and poultry. Health care providers commonly recommend high-potency B-12 to correct deficiency. If you don't have a deficiency, high-potency B-12 may be unnecessary. Your body can only absorb a small amount of B-12 at one time. When 100 to 1,000 micrograms of B-12 is administered via injection, 50 percent to 98 percent of the B-12 is excreted in urine, according to Drugs.com. If you suspect that you need more B-12, discuss it with your health care provider.

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