Nutrients in food are necessary for the healthy growth of human beings. Food we take consists of B Vitamins, Calcium, Carbohydrates, Cholesterol, Fat, Fiber, Folic Acid, Incomplete Proteins, Iron, Niacin, Protein, Riboflavin, Saturated Fats, Sodium Thiamin, Unsaturated Fats, Vitamin A, Vitamin C, Vitamin E, and many more. Nutrition is the science that interprets the interaction of nutrients and other substances in food in relation to maintenance, growth, reproduction, health and disease of an organism. It includes food intake, absorption, assimilation, biosynthesis, catabolism, and excretion. In humans, an unhealthy diet can cause deficiency-related diseases such as blindness, anemia, scurvy, preterm birth, stillbirth and cretinism, or nutrient excess health-threatening conditions such as obesity and metabolic syndrome; and such common chronic systemic diseases as cardiovascular disease, diabetes, and osteoporosis. This session discusses more about food and nutrients and its effects on human beings.