It's been a while, but here's to summarize so far:

I stopped taking my C-60 mixture at the end of June, to see if it had caused any change in my mental outlook.  The only thing I've noticed in the time since then, is a gradual decrease in energy, though still a bit more hyper-active than I was before starting.  I was a little worried that the C-60 would interfere with a free radical of nitrogen that is important in neural activity.  It hasn't appeared to cause any problems, however.

I intend to restart my dosage schedule at the end of August, after I can find a way to make it taste better.