Nutrition and Diet Therapy Practice Test 2025 – Your All-in-One Guide to Exam Success!

The primary function of proteins in the body is to repair and build body tissues. Proteins are composed of amino acids, which are essential for the growth, repair, and maintenance of tissues such as muscles, skin, organs, and more. When the body experiences growth, injury, or wear and tear, proteins play a vital role in synthesizing new tissues and repairing damaged ones. This function is crucial not only for physical health but also for maintaining overall bodily functions, as proteins are integral to many biological processes.

While proteins can provide energy and support immune function, these roles are secondary to their primary function of tissue repair and construction. In certain circumstances, proteins may be broken down to serve as an energy source, but this is not their main role in a well-nourished body. Therefore, the emphasis on repair and building underscores the critical contribution of proteins to health and vitality.