The numbers are in mcg's. So the normal range was 35-500mcg. My result was over 70,000 mcg. I was given a 50,000 mcg pill before the test. SO, basically I should have secreted <50,000 mcg. My result was an excretion of 141% instead of 90%. Does this help? Should I have my thyroid checked? My endocrinologist said she thinks this is not an endocrine issue.