I haven't looked into that wrt creatine broadly - you can get generic creatine monohydrate across the spectrum from cheap to expensive. In the case I gave, bulk

I haven't looked into that wrt creatine broadly - you can get generic creatine monohydrate across the spectrum from cheap to expensive. In the case I gave, bulk supplements does heavy mineral and contaminant testing on their supplements but it's going to vary depending on where you buy the generic from.