So once you turn 40, consider getting extra B12 through a supplement or multivitamin. Aim for 2.4 to 2.8 micrograms per day (the recommended daily intake), though you generally don’t have to worry ...

B vitamins You hear all about how important the B vitamin biotin is for strong, healthy hair, and that's true. However, running low on folate (also called folic acid) may also cause thin, brittle ...