So what would qualify as best?
I'm guessing it has to have no metals, pesticides, and herbicides so perhaps organic?
Not a lot of science backs up this commercial claim but let's aim for myotoxin-free?
Use clean mineral or spring water, goes without saying?
BPA-free?
Maybe no dairy / no cream?
No sugar or sweetener?
So no Starbucks...
No Bulletproof
What then?