The scientists with their fancy equipment and reports to definitively state if Wasabi powder actually contains Wasabia japonica or not. The only people who know if a certain Wasabi powder contains Wasabia japonica or not are the growers and processors who actually make the product. In the end, It comes down to the end user being satisfied with the product they are using and does it suit their purpose.
Scientific study set up to discredit a Cancer Killing Product? Colon cancer proliferating desulfosinigrin in wasabi (Wasabia japonica). Weil MJ, Zhang Y, Nair MG. Nutr Cancer. 2004;48(2):207-13. This is the published study that is continually referred to in order to show Wasabia japonica is no good to kill cancer. Personally, I think this was a […]