I tried tart cherry juice, it didn't do anything for me, and if this sucrose/fructose thing it that important then I think there are better directions to go in.
I went seven rounds with Google AI about sugars, triglycerides, uric acid, and all - and actually there's quite a lot known! I'm not sure how long it's been known, a lot of detailed metabolic information can be relatively new, last 10-20-40+ years new anyway, LOL. And some of these super-sweet fruits (including tomatoes which are after all a fruit) are new, too.
Remember, your body produces as much uric acid as it gets from purines, and apparently fructose, especially in even slightly larger amounts, can turn on some unfortunate processes that do so.
Do you know humans are the only animal that gets gout? The theory is we had the gene to clear uric acid because every other mammal does, but somehow we lost it 10,000 or 20,000 years ago. Some day maybe they'll fix that somehow.
So when they say "tomatoes sometimes trigger gout", that's not just observational, there's some pretty solid science behind it. Why it affects some people more than others is another question!