What are they are why do we need them? y are why do we need them? Scientific Discovery: Science has long ago proven that our bodies need proteins, fatty acids, carbohydrates, vitamins, minerals, phytonutrients and enzymes for optimal health. Science has now proven that there are a number of biological sugars (monosaccharides) which are necessary for all cellular and immune functions, enabling the body to maintain health. These essential saccharides make up the "alphabetic c