1. See the organization that issued the test report. If it is a report issued by a formal third-party authority or a qualified laboratory, the credibility should be relatively high. However, if it is a report issued by an authoritative or qualified institution or laboratory, its credibility is worth considering.

2. Even the report issued by a formal organization cannot guarantee the complete accuracy of the results, because the test results may be affected by many factors. Therefore, before buying any products, it is best to learn more about relevant information and refer to various opinions in order to make a more informed choice.

Generally speaking, consumers should be cautious, choose formal channels to buy Dr. David's underwear, and pay attention to the authenticity and accuracy of the test report. If you have questions or need more information, you can consult a professional doctor or relevant institutions.