He takes 6 drops per day in the morning stubbornly administered by my mother in law who is surprised by his turn around. And no, it is not attributed to the chemo or radiation as his prostate numbers were not dropping and he was feeling no better. He takes the 50 bottle religiously now and I've ordered two more one for him and one for my own father who suffers from dementia associated with Parkinson's. I hear it helps as well as the CBD has the ability to pass the blood brain barrier.