I can tell you qr is telling the truth about the powders not leaving the factory unless its very pure according to their test. Problem is the stupid fucks dont understand the testing they use. They use hplc column when they should be using mass spec.
Think of it like this
If I have a glass and I feel it half with whisky and half water. The hplc test set to detect the purity of whisky will filter out everything but the whisky and test just the purity of it, no impurities etc. So of course if I showed you that test you would say hey its 100% whisky. But if we mass specd it, it would show 50% water, 50% whisky.
You tell me is a glass of half whisky half water 100% whisky?
I hope I explained it ok. Ill link a post angus made in this very subject.