Summary
Adults should take 2.4 micrograms of vitamin B-12 daily, according to the Mayo Clinic.
1
Health experts recommend Methylcobalamin 1000 mcg from Pure Encapsulations
2
, MyKind Organics Vegan B12 Spray from Garden of Life
2
, Vitamin B12 Softgels - 1000 mcg from Nature Made
2
, and B12 TURBO from HUM Nutrition
2
, which also contains calcium.
According to