これは予想していたとおり

　⇒Arch Intern Med -- Abstract: Vitamin C Intake and the Risk of Gout in Men: A Prospective Study, March 9, 2009, Choi et al. 169 (5): 502

Conclusions Higher vitamin C intake is independently associated with a lower risk of gout. Supplemental vitamin C intake may be beneficial in the prevention of gout.

　もちろん、これで決まったというわけではないけど。
　
追記
　BBCにも⇒BBC NEWS | Health | Vitamin C a 'gout preventer'

Men who get plenty of vitamin C may boost their resilience to the painful joint disease gout, work suggests.
　
In the 20-year study of nearly 47,000 men, daily supplements of the vitamin found in sprouts, peppers and oranges appeared to cut gout risk.