Having looked up all kinds of diet things related to Gout, I have found that black cherries, are good/indifferent/bad for you.
But on the pratical side, what harm could you be causing by increasing your intake of fruits and veggies? I know that I don't eat enough good stuff as I should, and changing old habits is/are/am difficult, and almost impossible to maintain, but if you know that you have a whole shelf of canned cherries looking at you everyday, then you might start eating healthier. Tiny steps.
Tart Cherry pills? First I've heard of them, but would rather spit-pits then pop-a-pill.
Your mileage may vary.
Do you know how long it takes to pit [a] 20lb box of cherries?
Knowledge is an unending adventure at the edge of uncertainty. - Jacob Bronowski
You can move the world with an idea, but you have to think of it first.