Nutrition.gov is a usda sponsored website that offers credible information to help you make healthful eating choices. Why vitamins and mineral matter and what cdc is doing globally. food icon. healthy food environments. programs and policies that make healthier foods more accessible, including promoting nutrition standards. breastfeeding. resources, policies, research, recommendations, frequently asked questions and more related to breastfeeding. Nutrition is the biochemical and physiological process by which an organism uses food to support its life. it includes ingestion, absorption, assimilation, biosynthesis, catabolism and excretion. the science that studies the physiological process of nutrition is called nutritional science (also nutrition science ). Holozoic nutrition is the mode of heterotrophic nutrition that involves ingestion, digestion, absorption and assimilation of solid and liquid material. this type of nutrition is exhibited by amoeba that takes in complex substances and converts them into simpler substances. Dedicated to bringing together the world's top researchers, clinical nutritionists, and industry to advance our knowledge and application of nutrition.