A nutritionist is a health specialist who devotes his or her professional activity exclusively to food/nutrition science, preventative nutrition, disease related to nutrient deficiencies, and the use of nutrient manipulation to enhance the clinical response to human diseases, and advises on matters of food and nutrition impacts on health.
Nutritionist know the life sustaining powers of food. Nutritionists are medical professionals who look at disease causes and cures in terms of your diet. Some of the diseases that nutritionists work to alleviate on a regular basis are, obesity, diabetes and hypertension. They also work on fixing diets of people who are nutrient deficient. If you have a potassium deficiency for example, the nutritionist will help you to set up a potassium rich diet.