Brief Answer:
Lifestyle modification is important.

Detailed Answer:
Thanks for asking on HealthcareMagic.

I have gone through your query and understand your concerns. Let me mention that the mentioned pathology of high uric acid levels actually has two components: high uric acid levels in blood and deposition of uric acid crystals in joints. The former is not a cause of concern and does not need to be dealt with. This is because removal of uric acid from blood would automatically cause uric acid to be released again from the crystals, thus hardly causing any difference. Rather, it is only when the pain due to uric acid crystals aggravates that medicines like allopurinol are to be used.

Hyperuricemia or increased uric acid levels occur due to a metabolic problem involving certain protein metabolites. Uric acid builds up when the body makes too much of it or fails to excrete it. It is a waste product resulting from the metabolism of food. The level of uric acid in your blood can become elevated if the body produces too much or if it does not efficiently dispose of it. Animal proteins need to be restricted, especially red meat (which needs to be eliminated). Other plant sources of proteins can be consumed in moderate amounts. Other foods to avoid include bacon, herring, mackerel, sardines, scallops, shrimp, veal, venison and yeast extract. Meat servings need to be limited to less than 3 ounces per meal, and limiting foods high in fat, such as ice cream and fried foods. Fat causes uric acid to remain in the kidneys for a longer period of time. It is also very important to limit alcohol consumption. Recommended foods include all fruits, pastas, enriched cereals, eggs, peanut butter and nuts, and cheese. In addition, he needs to stay well hydrated by consuming plenty of water daily. This dilutes uric acid.

Please go through:
http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/gout-diet/art-0000
which will help you formulate a proper diet plan for your father.

Feel free to revert back with further queries.

Regards

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Brief Answer:
Need not restrict pulses or lentils.

Detailed Answer:
Thanks for writing back.

Although it was earlier recommended that lentils and pulses be restricted, the same is not advocated now. He can take all vegetables and pulses in moderate amounts. As mentioned, lifestyle changes and restriction of selective animal sources are more important.

Also go through:
http://patient.info/in/health/gout-diet-sheet

Regards

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