Pure tart cherry juice has roughly 29g carbs per cup, which is mostly fructose. It could very well be contirbuting to IBS

There are supplements of tart cherry extract in capsule form, which contain no sugar at all. Perhaps this could be an option for you? I checked online and see there are many brands available with a wide range in price.

Important to look specifically for extract of prunus cerasus, NOT prunus avium which is the sweet variety and doesn't have the same polyphenol content.

I might look into this myself .. although I don't have gout, I do have elevated uric acid. Older brother had gout and suffered greatly .. I'd like to prevent it without having to eliminate meat from the diet