I get the overly cautious routine with addicts, but the simple fact is that CBD is 100% safe. Even if there is a very small (0.1-0,2%) thc level in it, it's still completely non-psychoactive. Non-THC CBD tincture is easily available, but finding a quality source is the tricky part.
If the tincture has higher concentrations of THC mentioned like Vale did (like a 1:1, that is not CBD oil. That is a THC ratio.