The Biosana pH Control (urine test) contains 25 urine pH control strips for in vitro diagnostic use for individual use. They allow you to control the acidity level of your body by measuring its urinary pH. In a comparative study (n = 103), the exact pH was determined with an accuracy of 0.5 pH unit in 99% of cases. It is advisable to collect your morning urine in a container. Immerse the strip in the urine for 1 second (all staining fields should be submerged). Remove the test strip from the container and drain it to remove excess urine. Compare the color of the color fields on the strip with the color scale. Reading the results: take the values on the color scale into account (precision of the result ± 0.2 pH). Throw away the used test strips. Do not touch the color fields. Store in a cool, dry place.