Six categories of nutrients, three of them provide calories.
There are six categories of nutrients. Some of these nutrients provide calories.
Carbohydrates provide – 4 kcal/gm
Lipids – 9 kcal/gm
Proteins – 4 kcal/gm
Acohol provides 7 kcal/gm. However, alcohol is not a nutrient, it is a drug.