What is an example of an incomplete protein?

An incomplete protein is one that does not contain all of the essential amino acids that the body needs for various functions, such as building and repairing tissues. Nuts are considered an example of an incomplete protein because they generally lack one or more of the essential amino acids in sufficient quantities. While they do provide a variety of nutrients and some protein, they do not provide a complete amino acid profile on their own.

In contrast, foods like chicken, eggs, and fish are classified as complete proteins because they contain all nine essential amino acids in adequate amounts, making them more favorable for dietary needs where complete protein sources are required. This distinction is important for personal trainers and those studying nutrition, as understanding protein quality can help in designing balanced meal plans for clients.