Lipids are macronutrients essential for cell membranes, vitamin absorption, and hormone production. Classification, omega-3 and omega-6 essential fatty acids, and supplementation.

Carbohydrates are the body’s primary source of energy. Simple, complex, and dietary fiber: classification, glycemic index, and role in functional supplements.

Proteins are essential macronutrients composed of amino acids. Biological functions, dietary requirements, food sources, and forms found in supplements for sports, wellness, and health.