What protein products are best for building muscle mass?

im 17 years old, im a trained mma fighter, my first fight is coming up soon. Im a little on the scrawny side so im trying to bulk up. I have a really fast metabolism so i rarely gain weight, if i do it isn't much. And im constantly working out or training. All products ive tried so far havent done much. Im looking for a top of the line product that will put some damn meat on my bones. PLEASE only answer to this if you kno what your talking about and know about the products.


Thank you