Hi, Thanks for posting in HCM. I understand your concern. Protein supplements like Proteinex are required for muscle growth. Building musculature by protein supplementation would increase your weight a bit but it does not cause cause obesity. It would be better to supplement by proper means in the diet. Apart from taking protein supplements, you can also provide it by consuming it in the form of natural foods like egg white, pulses and soya beans. Hope the information provided would be helpful. All the best.