Good Antioxidant

Oxalic acid, as found in Naval Jelly, is a very powerful reducing agent. Its use might depend on what we were planning to do with it.

is that good on toast?

Let's just say it wouldn't be my first choice of jellies.

Reminds me of the weed called Oxalis..

http://www.ipm.ucdavis.edu/PMG/WEEDS/bermuda_buttercup.html

Apparently it's edible - http://en.wikipedia.org/wiki/Oxalis

I had a disturbing thought today. What if the question was really about dietary antioxidants? We should have been talking about grape seed extract, and stuff like that.

If that's the case, I don't believe a single one has been shown to be worth the cost of shipping.