Which nutrient is primarily affected by low-protein diets?

In the context of low-protein diets, the nutrient that is primarily affected is protein itself. When individuals consume a diet that is low in protein, they are not meeting the body's needs for essential amino acids, which are the building blocks of proteins. Proteins play critical roles in the body, including supporting cell growth, repairing tissues, producing enzymes and hormones, and maintaining immune function.

A low-protein diet can lead to a variety of health issues, such as muscle wasting, weakened immune response, and deficiencies in overall nutrient intake because protein sources often provide other essential nutrients. The body relies on protein to support numerous physiological functions, so inadequate dietary intake can significantly impair these processes.