Animal sources of protein are considered which type of proteins?

Animal sources of protein are classified as complete proteins because they contain all nine essential amino acids that the human body cannot synthesize on its own. These essential amino acids must be obtained through diet, and animal proteins, such as those found in meat, poultry, fish, eggs, and dairy, provide sufficient quantities of these necessary building blocks for our body.

In contrast, incomplete proteins, typically found in most plant sources, do not provide all essential amino acids in adequate amounts. While some plant proteins can be combined to form complementary proteins (which together provide all essential amino acids), they still require strategic pairing to achieve this. Low-quality proteins refer to those that offer limited nutritional value, often lacking in one or more essential amino acids. The classification of animal proteins as complete reflects their high biological value and nutrient density, making them essential in a balanced diet.