Holistic B-12 is a dietary supplement that contains the biologically active form of vitamin B12 and folic acid. Vitamin B12 and folic acid are involved in many functions in the cells and contribute, among other things, to normal blood formation, normal function of the immune system, normal psychological function and to reducing fatigue and exhaustion. Contains methylcobalamin, which is the biologically active form of B12 in the body. Consider the importance of a varied and balanced diet and healthy lifestyle.