Question

What are complement proteins?

Answer 1

Complete proteins are the protein sources which provide all the essential amino acids in good amounts for human use. Example of proteins include sources from animals like meat, fish, poultry, eggs, and dairy and others.
Incomplete proteins generally lack in, or are low in one or more essential amino acids. Incomplete proteins come from grains, legumes, and vegetables.

Complete answer:
As you see above, incomplete proteins are not considered “complete” as they lack sufficient amounts of amino acids when consumed alone. However, when they are paired with another incomplete protein or complete protein, the result is a complementary protein that gives all essential amino acids in adequate quantities to support health. The pairing of an incomplete protein food , like beans and rice is a good example.

Note: The Essential amino acids are the amino acids which must be obtained from the diet. The body can’t produce these with the use of other amino acids or components at all or in sufficient quantities to meet its needs. There are 9 amino acids which are generally considered as “essential”, like — histidine, lysine, methionine, phenylalanine, threonine, and valine.
Nonessential amino acids are the one which are not necessary to be obtained by food. They can be synthesized in the body from the food components. Other amino acids supply nitrogen to form amino groups, and fragments from carbohydrates & fat are used, to form the rest of the structure. Nonessential amino acids may also come straight from protein sources, but it is not always necessary. Nonessential amino acids have alanine, arginine, asparagine, glycine, proline, serine, and tyrosine etc.