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The dose is 1000 mcg (1 mg)
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B12 deficiency can affect individuals of all ages, but most particularly elderly individuals, as older adults are more likely to have decreased stomach acid production, which is necessary for B12 absorption and they easily develop vitamin B12 deficiency
Aug, C., Gam, X., Vergnolle, N., Lluel, P
K.Jennings Mayo-WilsonL.SpigelL.MorganI.ParkerA
Sexual Medicine Reviews
