Nutrition is the study that deals with food (nutrients) and nourishment.
There are several nutrients that the human body needs to acquire: protein, carbohydrates, fat, vitamins, minerals and water. Other elements include fiber and micronutrients like antioxidants, trace elements, and phytochemicals.
Nutrient-dense foods are those that provide substantial amounts of vitamins and minerals and relatively fewer calories.
Correct food combinations result in an immediate improvement in health by lightening the load of the digestive organs; better nutrition is assured, and there is better digestion, less fermentation and putrefaction, more comfort, less distress and less gas. So-called food allergies often disappear as a result of proper food combining.