i,ve been personal training for 4 yrs i see people using all brands,but where i work everyone uses same supplier the brands r tornell,QV,DK and some others mostly all mexican, they all have different price ranges, but all the same mg, does the brand of the product make much difference in the outcome as long as its not fake? is it worth paying 50$-60$ extra for something like DK over say QV?
THANKS FOR YOUR INPUT