I've not noticed much of a headache, except the night I drank almost a bottle of port while cooking with it.
My black berry and the store bought I drink hasn't done it to me yet with a full bottle.
But like Troy said, oh my what heartburn. But then everything gives me heartburn.
I think it's mostly from stress.
I've had problems with heartburn since I was in my late 20's. I think that by now the situation has become reversed.
My ulcer has a stomach.