What is the result of consuming excess kilocalories?

Consuming excess kilocalories leads to the surplus of energy that the body does not immediately use. When the intake of calories surpasses the number of calories expended through metabolic processes and physical activity, the body stores the extra energy primarily as fat. This process occurs because the body has a natural tendency to maintain energy balance; when it receives more energy than it requires, it converts that excess into fatty tissue, leading to fat accumulation.

In contrast, while weight loss occurs when there is a caloric deficit, and increased muscle mass typically requires a combination of adequate nutrient intake, resistance training, and sometimes caloric surplus depending on individual goals, these outcomes are not the direct results of simply consuming excess kilocalories. Similarly, improvements in metabolism can occur through various other lifestyle changes but are not a direct consequence of excess calorie intake alone. Thus, the correct conclusion regarding the impact of excess kilocalorie consumption is that it primarily contributes to fat accumulation in the body.