Animal proteins are often considered what type of protein?

Animal proteins are classified as complete proteins because they contain all nine essential amino acids in sufficient quantities that the body cannot synthesize on its own. Essential amino acids are those that must be obtained through the diet, as the body lacks the means to produce them. Complete proteins are critical for various physiological functions, including muscle repair and growth, hormone production, and overall cellular function.

In contrast, many plant-based proteins are considered incomplete because they often lack one or more of the essential amino acids. This means that individuals relying solely on plant-based sources need to combine different types of foods to ensure they get all the necessary amino acids for optimal health. Additionally, the term "low-quality" usually refers to proteins that don't provide a balanced amino acid profile and are less effective for supporting bodily functions, further distinguishing animal proteins as high-quality sources.

Thus, animal proteins’ status as complete proteins underscores their importance in nutrition, particularly for those needing to meet higher protein demands, such as athletes or individuals recovering from injury.