If you are starting a new low carb diet like the Keto Diet, Bulletproof Diet, or Atkins Diet, these strips are perfect for you to test your levels of ketones in your urine. Also, these work to test for diabetes as well. A simple, easy to read, color coded system helps you to determine your levels. Each bottle comes with instructions on the bottle, so they will be less likely to get lost or damaged. Each box has the expiration date clearly marked. Each bottle is marked CE and FDA approved. Thank you and please send us any questions you may have. KETO UP