Friend of ours is in Canada for the skating & wants to buy beta-alanine for his athletes. However, with the problem of contamination in so many US-based supplements with their 'proprietary' blends I wonder which brand would be the most reliable when it comes to being UNADULTERED 100% beta-alanine (fillers , anticoagulants are fine.. just no 'sekret' ingredients).

Athletes wouldn't want to be caught at a drug test for a stupid Merkan supplement contaminated with their last batch of prohormones after which they didn't entirely clean out their production facility.

He forgot to take a few bottles of our own brand, so now he's stuck with what he can get locally.. being GNC & the like. Price isn't the problem, purity is..

The answer needs to be given by 5pm Canadian West Coast time I assume...

Much obliged if you can help me out!