its all i use, and i love it. no pain for me, i guess im lucky, the pain has never bothered me. i guess some guys are sensitive to the BA. i mhave added extra BA to my QV 50ml mbefore and it still didnt bother me. i have had much better results since swithing from ttyoko to qv about a year and half to 2 years ago. i think its good stuff, but i have never had it tested either. but i trust my sources.