Hi i have been told today by my gp that i have b12 deficiency . how serious is this, and what should i do. any advice would be helpful?

Can be serious but..: B12 deficiency can lead to anemia (causing fatigue), numbness, depression, memory loss & dementia but is readily treated.Some need to simply take a B12 supplement (i advise the methylcobalamin form) but many who are deficient have trouble absorbing it & need shots or the sublingual form: http://www.Nytimes.Com/2011/11/29/health/vitamin-b12-deficiency-can-cause-symptoms-that-mimic-aging.Html?_r=0.