Most adults only need 2.4 micrograms a day. However, if you're over 50, the Linus Pauling Institute recommends a daily intake of 100 to 400 mcg from fortified foods or supplements, as absorption from food decreases with age. If you're feeling off and can't figure out why, this might be worth exploring. Even if your diet looks solid, B12 could still be slipping through the cracks. Read More