For fat loss I lower my calories do exercise n lost 20 pounds but see nothing difference in my body n I eat also less protein plz tell me what u think?

Weight loss. 1st congratulations on 20 pound weight loss. But I am curious that you can't see/feel any difference. Certainly your clothes should feel looser, at least at waist. I would also expect you to report increase energy since you're lugging around less weight. Eating less & exercising more are basic tenets to weight loss but we usually recommend eating enough protein, not less. Chat w/your FamilyDoc.