do you have a double blind study that was peer reviewed and not funded by industry that backs up that marketing claim?
i often find people have 'faith' in supplements...
IMO all faith is folly
I've found Pubmed to be pretty reliable after using them the last 3-4 years or so. They've published good info on HMB, which is a metabolite of Leucine. I'm still at the lab, but if you really want, I can try to locate the links later. BCAA's are one of the few supplements in which I have faith.