Hi Doug, I did a search of the Facebook group but couldn't find any reference to the amount of THC in the hempseed oil causing any problems for drug testing. As far as flax seed oil vs hemp seed oil I think they are comparable but the HSO is better. Here's one view on the topic - Good Hemp Oil vs Flaxseed Oil: https://www.goodhemp.com/hemp-hub/why-hemp-oil-is-better-than-flax-oil/

I think the problem with searching is if you are using a mobile device. Facebook leaves a lot to be desired. Here's the magnifying glass to search the group on Facebook used on a computer. On a phone it's hard to see the magnifying glass but it's at the top right next to the three dots menu.