Carbohydrates.
The most concentrated source of calories comes from carbohydrates. Carbohydrates has three types: monosaccharide, disaccharide and polysaccharide. These carbohydrates are from the combined atoms of carbon that is one of the most important source of energy for an organism. In most animals, carbohydrates are modified to become glucose or blood sugar by the digestive system and delivered to many cells in the organisms’ body that is used in many cellular activity.
Fatty foods, such as fast-food meals, are the most concentrated source of calories due to their high-fat content. ;
The most concentrated source of calories comes from fats, providing about 9 calories per gram. While fats are essential for energy and other bodily functions, they should be consumed in moderation. It's important to understand the different types of fats and their roles in a balanced diet.
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