Daily How Much

Most adults need about 2.4 micrograms of vitamin B12 a day, with higher amounts in some life stages or medical situations.

Most adult women need about 2.4 micrograms of vitamin B12 a day, with pregnancy and breastfeeding raising that target slightly.

Most healthy vegetarians do well with a daily vitamin B12 supplement of 25–100 micrograms, or 1,000 micrograms taken twice each week.

Most adults on omeprazole do well with 250–500 mcg of vitamin B12 per day, unless their doctor advises a different dose based on tests.

Most adults with diabetes get enough vitamin B12 with 2.4–4 mcg daily, but higher doses or injections depend on lab test results.

Daily vitamin B12 needs vary by age; most adults need about 2.4 micrograms a day from food and supplements combined.

Most healthy adults need about 2.4 micrograms of vitamin B12 per day, with slightly higher amounts during pregnancy and breastfeeding.

Most healthy vegan adults need around 2.4 mcg of vitamin B12 per day, often reached through fortified foods or supplements.

Most adults using Ozempic take 25–500 mcg of vitamin B12 daily, but your exact dose should follow blood tests and your clinician’s advice.

Most adults need around 2.4 micrograms of vitamin B12 per day from food, supplements, or both.