Food can be classified into 6 main classes:

1. Carbohydrates – including sugars, starches, and fibers
2. Proteins – including meat, dairy, legumes, and nuts
3. Fats – including oils, butter, and animal fats
4. Vitamins – including A, C, D, and various B vitamins
5. Minerals – including iron, calcium, and potassium
6. Water – a crucial nutrient for overall health and hydration.