There is no ‘best time’ for a drug test. If a drug test is a concern, for employment, or other major factor, then you should choose a THC-FREE CBD product, like an isolate or broad spectrum.
So depending upon what physiological process is off-kilter, your endocannabinoid system will help to rebalance it. When taking CBD regularly, many people describe the effect as, ‘I just feel different, better’. That’s because all CBD is doing is helping you achieve your natural balance.