I tried a urine heavymetal test kit (not mercury specific )about 6 months ago the results from the test were in the mid range for heavy metals but did not tell me which heavmetals were present ,your test looks much better than the one I tried it will show your level mercury specificly ,sounds like a good test ,it would be interesting to see if someone that had a recent hair analysis did one of these test and compare how close the results would be to each other.