A source of incomplete protein refers to a food that lacks one or more essential amino acids, which are the building blocks of protein that our bodies cannot produce on their own. Some examples of sources of incomplete protein include plant-based foods such as grains (rice, wheat), legumes (beans, lentils), nuts, and seeds. While these foods contain protein, they are deficient in one or more essential amino acids. Conversely, animal-based foods like meat, fish, poultry, eggs, and dairy products are considered complete protein sources as they contain all nine essential amino acids required by the human body.
