how much b12 do i take daily
1 For the general adult population, a daily dose of the smallest available tablet of B12 (usually 100 mcg) should be sufficient. 2  You require just a few micrograms a day. 3  Your body will absorb only a very small part of that pill. You require just a few micrograms a day. 2  Your body will absorb only a very small part of that pill. 3  The reason for this low absorption is that there is only enough intrinsic factor (the bodyâs chemical that shuttles B12 into your gut cells) excreted per meal to absorb 2-4 micrograms of B12.