best protein supplement for weight training

I was hoping that someone could recommend me best protein supplement for weight training. I have trouble gaining weight. I don’t know what to use for it since it is first time I am doing it. Any tips???

Weight gainers are high calorie protein products that are great for people who are looking to bulk up, so if you are having trouble gaining weight, taking in extra high quality calories will usually do the trick. I am not sure which one will be best for you, but I guess some of these: cytosport cyto gainer, optimum serious mass, universal real gains, prolab n-largeII. Good luck!