I took Mars CocoaVia for a couple of years maybe five years ago, then quit. Supplements are tricky because most of the time you don’t see any immediate improvement in anything. CocoaVia is expensive, too.
We have boxes of it we bought on one of their sales (maybe Black Friday) and, yes, it adds up.
I would encourage GlyNAC and green tea as a cheaper way to get some of these benefits.