CBD is the non-intoxicating cannabinoid from hemp — same plant as the one that gets you high, none of the high. It touches many targets weakly, which is why trials needed large doses. The part that matters clinically is separate: CBD slows the cytochrome P450 enzymes that clear roughly 60% of prescription drugs. In one epilepsy trial, adding it raised blood levels of the seizure drug clobazam about five-fold, enough to force a dose cut ¹. The same effect reaches statins, blood thinners, antidepressants, transplant and chemotherapy drugs ². "Natural" is not the same as inert.

The one clean signal is the one nobody's selling. Purified CBD cut convulsive seizures about 40% in children with rare epilepsies, at 10–20 mg per kg per day — for an adult, 700–1,400 mg daily under a neurologist ³. That's a prescription drug the FDA approved on that evidence.

For anxiety, the studied dose runs in hundreds of milligrams. 600 mg before a public-speaking test lowered anxiety scores ⁴; a follow-up found 300 mg helped while 100 and 900 didn't ⁵. A systematic review still rated the anxiety evidence insufficient to recommend ⁶. For chronic pain, the trials showing anything mostly used products containing THC, not CBD alone ⁷.

If you're going to try it, run it like a trial, not a habit. A 10 mg gummy every night, forever, told to no one is the pattern least able to give you an answer.

The honest arc is short. A four-week trial at a real dose gives a clean answer in a month: it worked and you continue with eyes open, or it didn't and you stop before the bottle sells itself to you for two more years. Skip it and a few hundred to a few thousand dollars a year stays in your account, along with the habit of checking dose against evidence before you buy — which pays off on every wellness product invented after this one.