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Because the body stores about 1 to 5 mg vitamin B12 (or about 1,000 to 2,000 times as much as the amount typically consumed in a day), the symptoms of vitamin B12 deficiency can take several years to appear. <ref>https://ods.od.nih.gov/factsheets/VitaminB12-HealthProfessional</ref> | Because the body stores about 1 to 5 mg vitamin B12 (or about 1,000 to 2,000 times as much as the amount typically consumed in a day), the symptoms of vitamin B12 deficiency can take several years to appear. <ref>https://ods.od.nih.gov/factsheets/VitaminB12-HealthProfessional</ref> | ||
There are several groups that have a higher risk of Vitamin B<sub>12</sub> deficiency. Relevant for the longevity commuity are: Vegetarians, vegans, older adults | There are several groups that have a higher risk of Vitamin B<sub>12</sub> deficiency. Relevant for the longevity commuity are: Vegetarians, vegans, older adults (age ≥ 50) and people taking [[Metformin]]. | ||
See [[Vitamin B12 Deficiency]] | See [[Vitamin B12 Deficiency]] |