Energy and nutrition
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.
- Protein has 4 calories per gram. (A gram is a measure of weight. There are 28 grams in 1 ounce.)
- Carbohydrate has 4 calories per gram.
- Fat has 9 calories per gram.
| Author: | Caroline Rea, RN, BS, MS | Last Updated: April 19, 2007 |
| Medical Review: | Ruth Schneider, MPH, RD - Diet and Nutrition Rhonda O'Brien, MS, RD, CDE - Diabetes Educator Andrew Swan, MD, CCFP, FCFP - Family Medicine | |
 | ||
| |