Let me be frank, there is no evidence that turmeric helps people who suffer from gout, and the science used to make this claim was not even based on turmeric. It was based on curcumin, which accounts for 3% or less of the total of turmeric.
It's not like telling people to eat citrus fruit for vitamin C.
So what does curcumin do that may help gout? It's a natural anti-inflammatory that was tested on animals only, and it was not tested on a mouse that had gout either.
It's assumed that it will help the inflammation caused by gout, but there is zero proof of this working. The misrepresented information is that the curcumin used in the testing was an extract of curcumin, so the useful compound is even less after reducing it from curcumin.
Who wants to eat 2 to 2 pounds of curcumin each day to gain enough of the useful compound to attain a significant effect, if it even works on gout in the first place?
Gout as a whole is a discombobulated mess with more holes in its story than a block of Swiss cheese. If you want to know more of how messed up the stories propagated about gout are, check out ExitConfessions Turmeric and gout post to see how deep the rabbit-hole goes.