This is in some ways a practical book, but the author is a science geek and the details were just so confusing including the Endocannabinoid System which I'd never heard of but does exist. That was confusing too. If you were desperate, I can imagine you wanting to pursue using CBD oil. Otherwise to me it's just too confusing to figure out and I would prefer just to stick to what I know, or stuff that has been more proven, is better understood.