What is a calorie deficit?

A calorie deficit occurs when an individual consumes fewer calories than their body expends over a specific period. This state leads to weight loss because the body begins to utilize stored energy, such as fat, to meet its energy needs. When consistently in a calorie deficit, the body taps into these energy reserves, resulting in a reduction in body weight and fat percentage.

This concept is fundamental in weight management and is often used in dietary plans aimed at reducing body fat. Understanding the mechanics of a calorie deficit is crucial for individuals seeking to achieve weight loss goals, as it highlights the importance of both dietary intake and energy expenditure. Rather than just focusing on food choices, maintaining an awareness of total calorie balance is essential for sustainable weight management.