There are 20 different ones in all. We can make many of them in our own bodies by converting other amino acids, but eight cannot be made, they have to be provided in the diet and for this reason they are called essential amino acids. Single plant foods do not contain all the essential amino acids we need in the right proportions, but when we mix plant foods together, any deficiency in one is cancelled out by any excess in the other. We mix protein foods a lot, both meat-eaters and veggies. It is a normal part of the human way of eating.
Examples are beans on toast or muesli.
It is known that the body has a pool of amino acids, so that if one meal is deficient, it can be made up from the body's own stores. Because of this we do not have to worry about complementing amino acids all the time, as long as our diet is generally varied and well-balanced. Even those foods not considered high in protein are adding some amino acids to this pool. Carbohydrates Carbohydrate is our main and most important source of energy, most of it is provided by plant foods. The sugars or simple carbohydrates can be found in fruit, milk and ordinary table sugar.