Which whey protein supplements will causes muscle gain but does not cause massive weight gain?

All if used right. I don't know of any whey protein powder that causes "massive weight gain." in general, weight gain comes from excessive starches &/or fats. Pure protein like whey does not cause this. But one will not have muscle gain just by eating whey- only by exercising as well! i strongly advise whey from grass-fed cows not given hormones & antibiotics, even better if processed at a low temperature.

Related Questions

I am a 23 male, 65 kg. Is it safe to take supplements like Iso 100, whey protein or Nitro Tech for weight gain?

Probably safe. Protein powders & shakes are not regulated by the USDA; there is no guarantee regarding strength/purity/safety. Independent analyses find the contents to differ from the label. Food sources of protein & calories are preferable. Of course, some allergies exist to whey & other components. If you are not allergic and avoid supplements with unnecessary additives/herbs, should be ok in moderation. Read more...