The quick and simple answer is that we don't know because there is insufficient research into BCAAs as a category, so it'll be harder to answer an in-depth question.
ComradeCat, I have been eating whole foods only for many years, mostly vegan, very occasional small servings of 100% grass fed/finished elk or buffalo from local ranch. I have read Price's book and think his work has been badly distorted by the foundation that is now using his name. All the groups of indigenous people he visited (except Inuit and Masai) were in fact eating mostly plants and relatively small amounts of wild game meat, not the very high fat diet promoted by the foundation. I decided to nix the BCCA's due to their tendency to bump up IGF-1 which though it does promote muscle growth, also can just as easily promote cancer growth. Too little IGF-1 and you run into problems but up to that fairly low level, the less the better for living long and healthy. I gladly trade that for bulking up
Good info Comradecat. ThanksThe quick and simple answer is that we don't know because there is insufficient research into BCAAs as a category, so it'll be harder to answer an in-depth question.
Here is examine.com's summary literature on it: https://examine.com/supplements/branched-chain-amino-acids/
Here are some common sources of BCAAs: Ask The Macro Manager: What Are The Best BCAA Food Sources?
From the generally accepted idea of BCAA's is that if you eat meat, you're probably getting sufficient BCAA from your food sources.
I have heard of BCAA's being suggested on calorie deficit diets, or during fasts. I presume it provides the body with essential amino acids during a period where it's not getting enough of them.