How long should I wait to read the results of urine ketone test strip?

For accurate results when using a urine ketone test strip, it is essential to read the results precisely 40 seconds after dipping the strip into the urine sample. This specific timing is critical because the color change on the strip is designed to stabilize within this window, providing a reliable indication of ketone levels in the urine. The color chart or key provided with the test strips corresponds to this 40-second mark to ensure consistency and accuracy in interpreting results.

If you extend the waiting period beyond the recommended 40 seconds, especially up to 2 minutes or more, the color on the test strip may continue to develop or shift. These additional color changes are not considered reliable and do not offer diagnostic value. As a result, relying on readings taken outside the 40-second window can lead to inaccurate conclusions about your ketone levels. To ensure that your results are both accurate and actionable, adhere strictly to the 40-second timing guideline when reading the test strip.