LEF is Life Extension Foundation. They sell supplements. Pharmacologically reliable, however not always the most inclusive. Their NAC formulations do not store well.
I will be very happy to talk about it in detail. Unfortunately, I can't give much info until we publish our own work in a year (at the end of the study). We stumbled on this other work when we were looking at metabolic pathways. The reasons are political and not scientific.
Thanks, PA Engineer, for the information. Your project sounds very exciting. Best wishes to you in this endeavor.