Which of the following statements best describes complete protein?

Which of the following statements best describes complete protein?


Complete protein is a term often used in discussions about nutrition and the importance of a balanced diet. It refers to a type of protein that contains all essential amino acids in the right proportions for the human body. In this article, we will explore what complete protein is, its sources, and its significance for overall health.

What is Complete Protein?

Definition: Complete protein is a term used to describe proteins that provide all nine essential amino acids required by the human body. Essential amino acids are those that the body cannot produce on its own and must be obtained through diet. These amino acids play a crucial role in various bodily functions, including muscle growth, repair, and hormone production.

Sources of Complete Protein

Animal Sources: Animal-based foods are considered complete protein sources as they contain all essential amino acids in the right proportions. Examples include meat, poultry, fish, eggs, and dairy products. These sources are often referred to as high-quality proteins due to their amino acid profile and bioavailability.

Plant Sources: While most plant-based foods do not contain all essential amino acids, there are a few exceptions that can provide complete protein. These include quinoa, soybeans, hemp seeds, chia seeds, and buckwheat. Combining different plant-based protein sources can also create a complete protein profile. For example, consuming grains with legumes or nuts with seeds can help achieve a balanced amino acid intake.

The Significance of Complete Protein

Muscle Growth and Repair: Amino acids are the building blocks of protein and are essential for muscle growth and repair. Consuming complete proteins ensures an adequate supply of all essential amino acids, promoting optimal muscle development and recovery after exercise.

Satiety and Weight Management: Protein is known to promote feelings of fullness and satiety, which can aid in weight management. Complete proteins, with their balanced amino acid composition, can help control appetite and reduce cravings, making it easier to maintain a healthy weight.

Supporting Overall Health: Amino acids derived from complete proteins are involved in various bodily functions beyond muscle growth. They contribute to the production of enzymes, hormones, and antibodies, supporting a healthy immune system, regulating metabolism, and promoting overall well-being.


In conclusion, complete protein refers to proteins that contain all essential amino acids in the right proportions. While animal-based foods are typically complete protein sources, certain plant-based foods and combinations can also provide a complete amino acid profile. Consuming complete proteins is essential for muscle growth and repair, weight management, and overall health. By including a variety of complete protein sources in our diet, we can ensure a balanced intake of essential amino acids.


1. healthline.com/nutrition/complete-protein
2. medicalnewstoday.com/articles/complete-proteins
3. eatright.org/food/nutrition/dietary-guidelines-and-myplate/choose-plant-sources-of-protein