How is he so large

Hey ! Someone who try to lose weight here lol.
Actually you don't really have to consume protein powder to build some muscles
You just need to incorporate it into your daily diet ! Eat more eggs, more beans,lentils etc... High protein food !
It's gonna be healthier for you and you'll now how to eat from that ! Don't forget to add vegetables and natural oil ! Avocado is really great for both.