Two dietary factors that may increase uric acid levels are purines (found in meat, particularly shellfish and organ meats, as well as legumes) and fructose (found in most sources of sugar). In general, limiting purines and fructose can lead to a reduction in uric acid levels, but this has not yet been shown to benefit people with active gout.
Some evidence suggests dairy products and salt (compared with low salt intake) may lower uric acid, but these have also not been shown to be beneficial in the context of gout.
Finally, weight loss can reduce uric acid levels, but more research is required to fully understand this relationship.