This article may help you understand the use of an EC meter to test for hydration and levels of minerals for proper electro magnetic conductance! Basically if you have X amount microsiemens you are mineral efficient! Too high a level indicates the lack of hydration!
DR. REAMS: We use the urine test. It measures the average blood sugar level by measuring urinary sugar levels. The sugar levels in the urine are relatively stable, so the urine test is superior to the glucose tolerance test in this respect. The urine test is non-stressful to the patient, so stress is eliminated as a factor. And the urine test measures all sugars, not just glucose. [Supplemental note: this test employs an ordinary brix refractometer. According to the RBTI, a urine brix reading of 1.5 is perfect when all other equation numbers are perfect.]