I have not. I can not find any labs that I can trust and that have not been hacked on a regular basis.

Sounds a bit extreme

It may be. I reset my gut bacteria some years ago and use this to improve the overall gut-scape. The 4 K's are great but my personal preference is to use this method that if for no other reason it is banned by WADA. If they consider it cheating then I like it that much more.