Which food group is richest in complete proteins?

Dairy products are the richest source of complete proteins among the options provided. Complete proteins are those that contain all nine essential amino acids necessary for human health. These essential amino acids cannot be synthesized by the body and must be obtained through the diet.

Dairy products, such as milk, cheese, and yogurt, provide high-quality protein that includes all essential amino acids, making them an excellent choice for those looking to meet their protein needs effectively. This is particularly important for individuals such as athletes, growing children, and those with increased protein requirements.

In contrast, while some vegetables, grains, and nuts can contribute to protein intake, they typically do not provide complete proteins on their own. For example, most plant-based sources of protein are considered incomplete because they lack one or more essential amino acids. However, combining various plant foods, such as beans and rice, can create a complete protein profile. Nonetheless, dairy products remain the most straightforward source of complete proteins within this context.