Which nutrient category primarily provides the body with energy?

Carbohydrates are the primary nutrient category that provides the body with energy. When consumed, carbohydrates are broken down into glucose, which is used by the body's cells as a key energy source. Glucose can be utilized immediately for energy or stored in the liver and muscles as glycogen for later use.

In addition to being an energy source, carbohydrates play a vital role in various bodily functions. They are particularly important for brain function, as the brain relies heavily on glucose for its energy needs. If carbohydrates are insufficient, the body may begin to use fat for energy through a process called ketosis, but carbohydrates remain the most efficient source of energy.

Proteins, while also crucial for the body's overall function, primarily serve as building blocks for tissues and have a secondary role in energy production, mainly when carbohydrate intake is low. Vitamins and minerals, on the other hand, are essential for various biochemical processes and do not directly provide energy but support the body's metabolic functions.