The few reasons to drinking bcaa's would be to help keep the body in a positive nitrogen balance, stave off catabolism and generate protein synthesis.
A few key times to add a scoop or two of bcaa would be:
- first thing in the morning as the body is deprived and under a lot of stress (which is why I also like taking vit-c and or some other type of antioxidants right when I wake up), a scoop of bcaa here will help kickstart the body into a more growth friendly environment
- drink during your workout as this will help minimize catabolism and help (in my experience) with strength and additional reps. When you workout, you are breaking muscle tissue down and depleting stores, drinking bcaa's during your workout is a great way to replenish what is being lost and give you one step forward towards better recovery
- a period of time where you are going to go without eating for more than 3+ hours is another great time to throw back a scoop or two of bcaa. This will help the body stay in a positive nitrogen balance keeping it growing and happy.
Just a few quick little tips that will maybe help