Vitamins and minerals are complex in nature and vastly different than chemically produced, drug-like substances called supplements. Needed in very small amounts, vitamins are essential for human life and metabolic processes. Although the body can produce and convert some of these, most nutrients need to be given to the body through the consumption of food.  In the toxic environment most of us live in today, in and out of the home, the body needs extraordinary support and nutrients to defend and heal its self. All of these nutrients should be consumed from fresh foods and pure whole food supplements like Physician's Strength (PS) Although considered a single substance, each vitamin is actually a “group of chemically related compounds.” Separating, or fractioning the group into single, incomplete vitamin portions convert it from a physiological, biochemical, active nutrient into a disabled, debilitated chemical of little or no value to living cells.