One bottle can help keep you headache-free for up to 55 glasses depending on how many drops you use.
Promising review:"I drank wine one night and did not use the drops. WOW, my IBS hit me like a knife! This proves that they really do work.I wish I had an option to give this product 10 stars!!!!I have had IBS for several years and last fall my IBS went into overdrive, after trying to figure out what was possibly causing it I realized that I have been drinking more red wine then usual. I researched it and sulfates in wine are known to irritate people with IBS. I put five drops in a glass of wine and stir it with a spoon; it does not change the taste of the wine. My youngest daughter also has IBS. I had her try it and it also cured her sulfate issues.I thought that I would have to give up wine, but no more!!!" —Keywest
Get it from Amazon for $14.99.