The major nutrients-protein, carbohydrate, and fat-provide the body with energy. This energy keeps your heart beating, your brain active, and your muscles working. The energy is measured in calories.
Nutrients in foods
| Nutrient|| Function|| Some sources|
|Protein has 4 calories per gram|| Provides energy; builds and repairs body cells; part of various enzymes, hormones, and antibodies||Meat, poultry, fish, eggs, beans, milk and milk products, grains, seeds and nuts|
|Carbohydrate has 4 calories per gram|| Provides energy needed by the brain, nervous system, and red blood cells||Breads, cereal grains, pasta, rice, fruit, starchy vegetables, milk, sugar|
|Fat has 9 calories per gram|| Provides energy; carries fat-soluble nutrients (vitamins); part of cell membranes, membranes around nerves, hormones, bile (for fat digestion)|
Meat and poultry, some fish, milk and milk products that are not fat-free, nuts and seeds, oils, butter, margarine, salad dressing, some candy, some desserts
WebMD Medical Reference from Healthwise
November 14, 2014
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this
© 1995-2015 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
Major Nutrients in Food Topics