Where do lipids, protein, and carbohydrates come from?
Lipids come from oils and fats ( animal fats, fish oils, vegetable, olive, peanut oil ).
Protein comes from meat, grains, fish, vegetables, poultry, legumes. Meat protein best matches our body's need for protein though.
Carbohydrates are sugars and starch. Table sugar, sugar from milk, fruit, starchy foods are sources of carbohydrates.