These nutrients are usually required in large amounts in the body and constitute the bulk of the diet.

They are amounts usually measured in grams. There are three macronutrients:

1. Protein

2. Fats (including cholesterol)

3. Carbohydrates (sugars, starches and fibre)

N.B.
Water is discussed later as it not a true nutrient.

Alcohol is regarded as an anti-nutrient and is also discussed later.