I did for a while. I added cinnamon, turmeric and black pepper as well. I know how it sounds, but I loved it. I stopped when Seth Roberts died because I got a bit freaked out, and didn't really pick it up again except now and then.

I can't say that it made me feel more clear headed or energetic or anything, but that might just be me (https://news.ycombinator.com/item?id=10573324).