When I had left hope of the dream that I can also someday become healthy and fit like all others. I had alreay lost hope on every protein powder after using some.
My cousins and friends also said those protein powder only does is increase the fats in unproportional way and if stoped, it can have many unwanted side-effects. But as a wonder, my aunt brought me nutrilite protein powder and it came out to be very tasty and also quite affordable. Lastly I would say, dont lose hope of your thinness and try nutrilite once. I have gained 15kg in 6 months with proper healthy diet and a little daily workout. Stay fit.