I've seen B-12 pills of up to 1,500 micrograms each in my food co-op, but the daily requirement is just 3 micrograms. A: Vitamin B-12 deficiency is far more common than most people realize.

She finally tried prune juice, and it works, but a little too well. ... I’ve seen B-12 pills of up to 1,500 micrograms each in my food co-op, but the daily requirement is just 3 micrograms.