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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.

Most adults with hypothyroidism take 2.4 mcg of vitamin B12 daily unless tests show deficiency that needs higher, doctor guided doses.

Most adults with neuropathy use 1,000–2,000 micrograms of vitamin B12 daily, but high-dose plans need approval from a clinician.

For most adults, daily vitamin B12 for energy ranges from 2.4 micrograms in food to around 50–250 micrograms from supplements.

For most healthy adults, a safe daily vitamin B12 dose is around 2 to 4 micrograms from food and supplements combined.

Most women over 50 do well with 2.4 micrograms of vitamin B12 a day, or 500–1,000 micrograms weekly if using high-dose supplements.