The best supplement for me, until now, was "Pure Protein GF-1" from "USN", which is a 2.28kg bottle with 40 grams of protein, 2.2 grams of carbohydrates, 1.2 grams of sugar, 2.8 grams of fat and 17 grams of BCAAS, L-glutamine, glutamic acid per dose. And the fact that it has so much protein and few fat and carbohydrates make you earn muscles without getting fat. And it also regulates your digestion and you intestines which makes you see results so much faster, and also makes you look thin all the time.
This supplement exists in many flavors like vanilla, strawberry, chocolate and pistachio.
All you have to do to take this supplement, is to had 2 scoops of it to 250 mls of water in a shaker and shake for 30 seconds.
I personally use it (vanilla version) once a day, after my workout, and i liked it so much that I already bought my second bottle, because one bottle lasts 55 days for me.