I am not familiar with Thorne products. Just cruised the site. I was impressed by the fact that on their science and medical team there were several NDs. That is encouraging. But, some of their professional collaborations are concerning - like the Mayo Clinic, Johns Hopkins, and the NIH to name a few. All of those collaborators are the belly of the beast so to speak. I did not see any indication of independent purity verifications with any of their products. That would be testing for heavy metals and other contaminants. Products geared towards athletic performance may not always be the cleanest. It is a multibillion dollar industry on its own and big pharma probably has their hands in that pie somewhere on the backend. Just my opinion.