Gout is a common form of arthritis, particularly in New Zealand. The mainstay of treatment is a sustained reduction of blood uric acid levels. While there are effective treatments, many patients have attacks of gout when they start treatment. Tart cherry concentrate has been shown to not only reduce blood urate but also prevent gout attacks. In this study we will investigate the effects of various doses of tart cherry concentrate to determine the best dose to use in a large clinical study. We will also examine whether participants tolerate and adhere with tart cherry concentrate treatment.