Growers / producers in states with medical or recreational are a good place to look, since they have a vested interest in not losing their license. Some companies publish lab results — because, like you said, the regulation hasn’t caught up yet and you don’t know what you’re getting.

Legally, unless a state has specific laws against it (TX maybe?), the 2018 farm bill made hemp and its derivatives legal. But then the FDA jumped in right away and said, CBD supplements aren’t legal without approval.

IANAL, but I think the FDA memo applies to producers; I.e., I don’t believe one could get in trouble for buying CBD oil, but someone could theoretically get in trouble for selling it, if they market it as a supplement.

My concern is that it seems to be touted as some kind of "wonder cure" for anything and everything. While I'm sure a lot of people have seen results in various areas it does set off my bullshit alarm.

Many states with legal marijuana include regulations that require lab analysis results on a label attached to the product. This includes things like marijuana-derived CBD products.