At Nature’s Night we believe in quality, value, and full transparency when it comes to laboratory testing results. Very few brands in the supplement industry share their lab results with the public, Nature’s Night is very proud to do just that! We test every single batch for potency, purity, microbiological activity, and heavy metal content. You can enter the batch number on your bottle below to check the test results. The batch number is on the bottom of your bottle just above the expiration date. Sample Certificates of Analysis are available for view below.  Please note that all nutritional supplements are formulated with what’s called an overage to ensure the product remains at labeled potency throughout its shelf life. With that said, it’s normal and acceptable for the tested potency to be slightly above label claim.