Weight loss refers to the overall reduction in body weight, which can be a combination of muscle, fat, water, and even bone mass. The most common way to measure weight loss is by using a scale, but it doesn’t provide an accurate picture of the body’s composition.

Fat loss, on the other hand, refers specifically to the reduction of body fat. While weight loss can include a loss of muscle, fat loss is specifically targeted towards reducing the amount of fat in the body. Body composition measurements, such as skinfold calipers, bioelectrical impedance, and dual-energy x-ray absorptiometry (DXA), can be used to measure body fat and muscle mass.

It’s important to note that weight loss does not always mean fat loss. Crash diets, extreme calorie restriction, and excessive cardio can cause muscle loss, which can slow down the metabolism and make it harder to maintain weight loss. A healthy and sustainable weight loss program should focus on fat loss and include a balanced diet, strength training, and cardiovascular exercise.

It’s recommended to consult with a healthcare professional before starting any new diet or exercise routine, especially if you have any health concerns.