Originally Posted by BendtheBar
If you don't or can't eat much of a variety of protein sources, BCAA supplementation can help fill in the cracks and flesh out your amino acid profile.
I tend to take BCAAs with protein shakes, and when I am cutting.
An amino acid profile is like a fingerprint. Each protein food is different in what they offer as far as aminos/BCAAs. A bodybuilder who is forced to live on a strict diet will not have a very beefy and broad spanning amino profile, and may benefit from supplementation.
I agree with this--I really don't see the need for BCAA supplementation as long as you are getting adequate protein.