Vitamin A is available in various formulations: tablet, suppository, softgel, ointment, liquid, cream and capsule.  The recommended dietary allowance (RDA) for Vitamin A is 5000 IU daily for men and 4000 IU daily for women… Read the full article: Vitamin A

Vitamin B12 deficiency symptoms are manifest not because people are taking less vitamin B12 than recommended. Rather, the reason lies in the fact some individuals showing vitamin B12 deficiency symptoms are unable to absorb vitamin B12 from food… Read the full article: Vitamin B12 Deficiency Symptom

The main benefit of vitamin B12 in food is to function as a methyl donor. By working with folic acid, it plays an important role in the synthesis of DNA (the genetic material of all cells). It also appears to promote and maintain the normal function of healthy nerve cells and red blood cells… Read [...]

There has never been any toxic or adverse vitamin B12 side effects associated with large intakes of the vitamin. Whether from food or supplements vitamin B12 side effects are nonexistent in healthy people… Read the full article: Vitamin B12 Side Effects

The richest dietary sources of vitamin B12 are liver, especially lamb’s liver, and kidneys. Eggs, cheese, and some species of fish are also great sources of vitamin B12… Read the full article: Vitamin B12 in Food