The book that I mentioned, recommended a variety of Over-the-counter supplements that increase blood flow through the brain, or in some way enhance or precurse natural brain chemicals and function.
Inositol is one of them, and is a seratonin modulator (if I remember correctly) and is very useful for ADD prefrontal cortex regulation. Some of the others like Omega 3's, ala, vitamin e and c, ginko biloba, valerian root, phosphatidalserene, GABA, sAME, and vinpocitine, are all recommended brain enhancing chemicals for various brain activities.
MMS is (of course) NOT MENTIONED in the Dr. Amen Brain book, but it's ability to reduce inflammation is mentioned in JH's 2 book and inflammation is one of the biggest culprits in most serious diseases.
I haven't tried "No-flush" niacin but inositol didn't really do much for us. I've been trying the above list of supps, one at a time, in order to be able to distinguish what works and what doesn't. I also keep an informal Excel spreadsheet about symptoms, dates, and doses for the various trial supplements.
I tried VINPOCITINE (glucose uptake) and it's known for it's migrane-like side effects, but it dramatically enhances blood flow in the brain, IF you can tolerate the tendency towards headaches. I've seen young kids start talking for the first time, just HOURS after a does of this stuff. It's amazing that it's available over the counter!
As far as CQ-10 side effects, I've never had ANY side effects that I noticed. But taking ENOUGH cq-10 will make you noticeably more alert after a couple of weeks, and as time goes on, memory and cognition also seem to grow.
Gosh, as I re-read what I've written here, I'm probably giving the impression that our house is just one big drugstore of trial sizes.....lol...... but it's really not.