Plant-based protein sources are not the same as animal protein sources. Proteins are made up of amino acids which are the building blocks of every cell and hormone in our body. Meat protein contains all nine essential amino acids, whereas plant-based protein usually lacks at least one of the nine essential amino acids our body needs.
Unripe jackfruit makes a convincing choice for pulled pork alternatives, curries and burgers. But it is almost valueless if you needed protein since jackfruit consists of carbohydrates. Vegan burgers are made up of beans, but this is not a complete protein source.