Which macronutrient is considered a major source of fuel for the body?

Carbohydrates are considered a major source of fuel for the body because they are easily broken down into glucose, which is the primary energy source for many cells. When ingested, carbohydrates enter the digestive system and are converted into glucose, allowing for rapid energy production, especially during high-intensity activities. This quick conversion makes carbohydrates particularly essential for maintaining energy levels during workouts and daily functions.

In addition to providing immediate energy, carbohydrates can be stored in the liver and muscles as glycogen for later use. This storage capacity serves as a reserve that the body can call upon when needed, making carbohydrates a versatile source of fuel. When the body requires energy, particularly in anaerobic situations or while engaging in physical activity, it primarily relies on glycogen derived from carbohydrates.

While fats and proteins can also be used as energy sources, they are utilized differently. Fats serve as a concentrated energy source and are more commonly used during prolonged, lower-intensity activities. Proteins, while important for building and repairing tissues, are not typically utilized for energy unless carbohydrate stores are low. Citing vitamins in this context is misleading, as they are essential for various biochemical functions in the body but do not directly provide energy. Overall, carbohydrates are the most efficient and readily accessible