How does uric acid level affects knees and heart?

How does uric acid level affects knees and heart?My father has a problem in his knees, probably owing to his age.
Once i heard doctor saying about his uric acid level, also affecting his heart.
how does uric acid level relates heart and knees, and is there any home-made recipe that i can have to help my father? Help please.

aziz
visit http://www.news-medical.net/news/2005/03/29/8770.aspx and http://www.arthritis-treatment-and-relief.com/arthritis-gout-knee.html ,no home recipe available(proven)

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