Nutritional science is concerned with how the body reacts to food. It covers research on molecular interactions, metabolic and signalling pathways, physiology, pathology, and toxicity, as well as the nutrients themselves.Nutrition is the process of getting the right amount of nourishment and energy from the food you eat or the process of getting the right amount of nourishment and energy from the food you eat. A nourishing material administered to hospitalised patients by an IV or IG tube, such as nutritional solutions.Dietetics is concerned with the science of nutrition in order to discover solutions to prevent diseases such as diabetes and cancer. Students will take a number of science-based modules in the first year of a Dietetics degree, including Food Science, Human Physiology, and Nutritional Biochemistry.