Carol - I think I mentioned this before but alot of oxalic acid can be removed prior to ingestion. My ex-husband could not tolerate oxalic acid but loved rhubarb. I pour boiling water over the chopped rhubarb and let it sit a few minutes. I then pour off the water and alot of oxalic acid. What remains is rhubarb without the bite. It actually works well.

I know someone who actually makes wine from rhubarb. I have told him I think its a bad idea but I think its too late. He drinks alot of this wine and I think it actually affects his mind in ways that other wines do not. I can't imagine what it is doing to his body.