Hello dear Understand your concern Endura mass is not much effective. All these items available in market of protein powder contain synthetic steroid so regular use of it may be a cause of kidney failure and so much side effects on long time. So beware of all these items. For weight gain best is doing regular weight strengthening exercise and eating nutritional foods like eggs, milk, banana, meat, whole grain all these items help you to gain weight. So more workout and more input is the best. Start regular exercise in early morning that boost your mrtabolism Hope this may help you. Thank you. Best regards Dr. Sagar