What are the three major macronutrients?

The three major macronutrients are carbohydrates, proteins, and fats. Each plays a distinct but essential role in the body’s functioning.

Carbohydrates are the body's primary source of energy. They break down into glucose, which is used to fuel various physiological processes and physical activity. Carbohydrates can be simple, like sugars, or complex, like starches, both of which are vital for maintaining energy levels.

Proteins are crucial for growth, repair, and maintenance of tissues. They are made up of amino acids, which are the building blocks that the body uses for everything from muscle repair to immune functions. Proteins also play a role in hormone production and enzyme activity.

Fats, or lipids, are important for several bodily functions, including hormone regulation, nutrient absorption, and cellular structure. They provide a concentrated source of energy and are essential for the absorption of fat-soluble vitamins.

The other choices include components that are important for nutrition but do not encompass the three major macronutrients as defined in nutritional science. For instance, vitamins and minerals are micronutrients essential for various biochemical processes, while sugars, starches, and proteins represent only a part of the picture without including fats. Lastly, amino acids, fatty acids, and