What is the caloric deficit required to lose one pound of body weight?

The concept of a caloric deficit for weight loss is built on the understanding that to lose body weight, energy expenditure must exceed energy intake. Research has established that a deficit of approximately 3,500 calories is needed to lose one pound of body fat. This figure arises from the approximation that a pound of body fat is composed of about 3,500 calories worth of energy.

When seeking to lose weight, creating a caloric deficit through a combination of dietary changes and increased physical activity can help achieve the desired results. By understanding this relationship, individuals can plan their diet and exercise regimens more effectively.

In contrast, the other options represent figures that do not align with this established value; they are either too low or unrealistically high based on the energy density of body fat. Thus, using the 3,500-calorie guideline provides a practical and scientifically supported target for weight loss strategies.