Interesting idea, to clarify though it would seem to be crucial to ingesting BCAA’s that contain zero (0) sugar. Coach Chad mentions in this article that ingesting anything before a fasted ride besides caffeine will make the fasting ride pointless.
“Even though there’s not a ton of sugar in something like half and half or low-sugar coffee creamers, there’s still some, which will disrupt the entire fasting process if you consume it. Why? Because you’ve just introduced glycogen into the mix.”
Most BCAA’s have a lot of sugar (either fake or real), so you would have to go the sugarless route…
Interesting discussion on BCAA’s can be found here too