“Nutrition is the biochemical and physiological process by which an organism uses food to support its life. It provides organisms with nutrients, which can be metabolized to create energy and chemical structures. Failure to obtain sufficient nutrients causes malnutrition. Nutritional science is the study of nutrition, though it typically emphasizes human nutrition.”*
Nutrition influences our bodily functions and it can be argued our mental functions as well. It is said : “Tell me what you eat and I will tell you what your are.” Anthelme Brillat-Savarin
https://en.wikipedia.org/wiki/Nutrition