Caporegime
BCAAs are a total waste of money mate. Just have some whey instead
As with most things you can find something to prove/disprove depending what your looking for. There is some research that shows benefits when training hard. So I take it for insurance, to tick a box. I also want to take in the electrolytes, Citrulline Malate and L-Glutamine. It's better than water when training and taste good.
https://examine.com/supplements/branched-chain-amino-acids/
I have Whey in the morning, have done for the past 13 years I've been training.