Clinical Nutritionist Practice Test 2025 – Complete Exam Prep

The correct answer identifies carbohydrates, proteins, and fats as the macronutrients essential for human health. These three nutrients are fundamental because they provide the energy necessary for the body to function and support various physiological processes.

Carbohydrates serve as the primary source of energy for the body. They are broken down into glucose, which fuels cells and is crucial for the brain and red blood cells. Proteins play a critical role in the growth, repair, and maintenance of body tissues. They are also involved in enzyme production and immune function. Fats are vital for energy storage, hormone production, and cellular structure, as well as helping the body absorb fat-soluble vitamins (A, D, E, and K).

Other options listed contain essential nutrients but do not encompass the primary macronutrients. For instance, vitamins, minerals, and water are classified as micronutrients and are important for various biochemical reactions and processes, but they do not provide energy. Similarly, while fiber, antioxidants, and probiotics contribute to health, they are not classified as macronutrients. Lastly, cholesterol is a type of fat (lipid) and while it plays a role in health, it's not categorized as a macronutrient in the same way carbohydrates, proteins, and