In addition, some tests measure all urine sugars, or have a small range of negative or positive readings, which means they may not be appropriate for everyone at all times. You'll need to work with your health care team in choosing the product that is right for you. Urine testing products are read by comparing the test color to a standard color chart. If you have trouble distinguishing colors, or if the color blocks appear too small, you may be able to try a different product with success. If you are color-blind, check with your health care team about which test is best for you.
Many factors can affect results.
Large doses of vitamin C or some antibiotics will influence the results, as will placing test materials on a counter recently cleaned with bleach. Be sure to read the package insert of whichever product you choose to make certain you are handling that product correctly. These products are sensitive to light, temperature extremes, and moisture. Follow manufacturer's instructions for storage. Do not use products if the initial color comparison doesn't match.