What term describes protein foods that lack one or more essential amino acids?

The term that describes protein foods that lack one or more essential amino acids is commonly known as "incomplete proteins." These are proteins that do not provide all nine essential amino acids required for the body to function optimally. Essential amino acids are those that the body cannot synthesize on its own and must be obtained through diet.

Incomplete proteins are typically found in most plant-based foods, such as grains, legumes, and vegetables. While these foods may be rich in certain amino acids, they fall short in one or more of the essential amino acids, thus providing a lower biological value compared to proteins that contain all essential amino acids.

Understanding the difference between incomplete proteins and other types, such as complete proteins, which contain all essential amino acids, is vital for those planning balanced diets. Complete proteins are typically found in animal products such as meat, fish, eggs, and dairy. Recognizing the importance of both types of protein can help individuals combine different food sources effectively to ensure they receive adequate nutrition.