"Each of the Viridian B-complex supplements offers a full array of the B vitamins together with a higher level of a featured B vitamin. This supplement features a higher levels of methylcobalamin and cyanocobalamin (vitamin B12).B12 contributes to normal homocysteine metabolism and red blood cell formation, to the reduction of tiredness and fatigue, the energy-yielding metabolism, to normal psychological function and the functioning of the nervous system. Vitamin B12 also contributes to the normal function of the immune system. Folic acid (folate) contributes to a reduction in tiredness and fatigue, the normal function of the immune system, normal psychological function, and the processes of normal homocysteine metabolism, amino acid synthesis, cell division and blood formation.B complex vitamins (B1, B2, B3, B5, B6 & B12) contribute to the reduction of tiredness and fatigue, to normal psychological function and mental performance, energy-yielding metabolism, the regulation of hormonal activity, the functioning of the immune, cardio and nervous systems and the maintenance of normal skin, mucous membranes, vision and red blood cells. B complex vitamins also contribute to the protection of cells from oxidative stress. This 'oxidative stress' appears to be a major factor in many human diseases."