When patients lose weight as a result of healthy changes in diet and a regular exercise program, that weight loss is real. Fad diets and pills often yield impressive results, but are too often followed by a yo-yo weight fluctuation pattern.
Having said that, healthy active patients often reach a weight plateau. This plateau weight may or may not be the "goal weight". Goal weights can be demoralizing if they are not sustainable. We all have a weight we would like to be, but that weight may not be realistic. Better to be happy at a healthy, sustainable weight resulting from a good diet and exercise.