Nutrition is essential for our health. Various foods we take everyday are essential to live. Nutrients interact within and between all relevant biological, social and environmental systems. Because of the lack of evidence we don't realize that nutritional problems are critical. But, nutrition is a very critical for treatment and prevention of diseases. So, there is huge interest in the area of nutrition and health, including nutrigenetics and nutrigenomics. Especially, the importance of micro-nutrients is revealed in many aspects of health, especially in chronic diseases. Diabetes Mellitus is an example. Depletion and unbalanced micro-nutrients can create very severe illnesses, so an integrative approach on nutrition is very important.