It helps your body release energy from carbohydrates, fats, and protein. This is found in meat, fish, poultry, dried beans, and peas. A deficiency leads to a disease called pellagra. read more
3 A List of the Major Nutrients Provided by Each Food Group 4 5 Main Food Groups An essential nutrient is a nutrient that the body cannot synthesize on its own -- or not to an adequate amount -- and must be provided by the diet. read more