To lose 1 lb of body weight, a person must create and maintain an energy deficit equivalent to:

To lose 1 lb of body weight, a person must create and maintain an energy deficit of approximately 3,500 kcal. This figure is widely recognized in the fields of nutrition and weight management as a general rule of thumb. The principle behind this measurement is based on the fact that 3,500 kcal is roughly equivalent to the caloric content of 1 pound of body fat. Therefore, to achieve weight loss, an individual must consume fewer calories than they expend, leading to this caloric deficit.

Creating this deficit can be accomplished through a combination of reducing caloric intake and increasing physical activity. This balanced approach ensures that weight loss is safe, sustainable, and supportive of overall health. It's important to note that while the 3,500 kcal rule serves as a helpful guideline, individual variations may exist based on factors such as metabolism, body composition, and overall health.