Chinese creatine is tested for impurities a lot of times the consumers demand it. There's no reason why the Chinese would add impurities wilfully in their powders.. If crap is found in their supps, say goodbye to that business.
There was one joker here, a supp manufacturer, who said Creapure was the shittiest creatine around But he never said why.
Remember when China killed a bunch of babies with impure baby formula that was modified to give a fake protein reading when tested? China also makes a lot of the vape fluid that has been found to contain a ton of crap. China cares about making money and not your health.
Creapure is the gold standard for clean creatine. I wouldn't eat a piece of bread made in China.
All I know is that creatine was the only supplement that actually worked for me. Maybe I was a good responder. No doubt I got more reps with the stuff. I stopped taking it when my doc said my kidney tests came back bad. He told me to stop taking creatine and what do you know the tests came back perfect. Some say creatine throws off kidney tests because of how it is processed in the body and changes to creatinine throwing off the kidney test.