Which of the following best defines a calorie deficit?

A calorie deficit is best defined as a situation where the number of calories burned exceeds the number of calories consumed. This condition leads to weight loss, as the body begins to utilize stored fat to meet its energy needs when there’s not enough energy (or calories) coming in from food.

In essence, to achieve a calorie deficit, one must either consume fewer calories than are expended through activities and basic metabolic processes, or increase physical activity levels to burn more calories than are consumed. This principle is foundational in many weight loss strategies and is supported by the basic laws of energy balance.

When calories burned surpass calories consumed, the body draws on its energy reserves, resulting in weight loss over time. This is crucial for anyone looking to manage their weight effectively, whether the goal is to lose weight or to understand the energy dynamics involved in body composition.