levels are 2.4-6.0 mg/dL (female) and 3.4-7.0 mg/dL (male).so you have slightly increased values...high uric acid levels leads to gout..so there is toe, wrist, ankle pain.
There is no any contamination..you both eat same food so both are suffering from same thing...
avoid following food (exogenous cause)
All organ meats (such as
liver), meat extracts and gravy
Yeasts, and yeast extracts (such as beer, and alcoholic beverages)
Asparagus, spinach, beans, oatmeal, cauliflower and mushrooms..
there are many other causes of increased levels,,, please consult online so that I can explain in detail
do following investigations
Kidney function test
urine examination