MultiPhytoNutrient Complex is formulated to include optimum amounts and presentations of the best quality vitamins, minerals, co-factors and plant extracts. This is a two-a-day supplement. Vitamin C plays an essential role in numerous areas of human health. Vitamin C contributes to normal collagen formation for the normal function of bones, cartilage, skin, gums and teeth. Vitamin C also enhances iron absorption and the normal energy-yielding metabolism. Vitamin C aids in the maintenance of the immune system including during and after intense physical exercise. Vitamin C contributes to normal psychological function, the functioning of the nervous system and contributes to the protection of cells from oxidative stress. This 'oxidative stress' appears to be a major factor in many human diseases .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.Vitamin D contributes to the maintenance of normal bones, teeth, muscle function and immune function. MultiPhytoNutrient Complex is iron free.