Interesting, but perhaps not surprising, that sumac has one of the highest ORACs. This is where the active component of BrewtanB is derived from if I'm not mistaken.
That is my understanding as well.
Paranoid, thanks for bringing ORAC to my attention, now I have the explanation why plain old tannic acid from LHBS (chestnut I think) might not have the same effect as Brewtan. Brewtan most likely has a higher ORAC.
Do I have this right? ORAC is NOT an O2 scavenger right? It cannot remove O2 whereas SMB/ascorbic can.