Here are the 2 studies establishing the link between PD and urate:http://www.ncbi.nlm.nih.gov/pubmed/18413464http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2391073/
When 804 subjects with early PD had their plasma urate measured the subjects in the top quintile (fifth) reached the end point (stage of development of PD) at only half the rate of subjects in the bottom quintile.
To give you an idea of the range of urate concentrations measured in coontrols vs PDcases I quote from the second study which retrospectively looked at plassma levels of 18000 men:
"Considering urate concentrations (all in mg/dL) of < 5, 5 to < 5.5, 5.5 to < 6, 6 to < 6.5, 6.5 to < 7, and 7 or higher the number of cases/controls were 22/27, 10/22, 19/30, 11/23, 10/20, and 12/43 in each of those ranges, respectively"
So, there is no normal urate level.......you just want to make sure you are at the higher end.As for measuring urate level,I intend to take no more inositol than commonly used as a nutritional supplement and to discuss it with my neurologist when next we meet.....