Imagine The Superman Shop that you just discovered. The shop does not leave out an opportunity to tell you that the team has more strength and superpowers than the real Superman. And they mean it. Would you buy immediately? Very unlikely.
For example, if you are selling on a global basis use geolocation data to your advantage by using social proof, e.g. other people in a customers' city just bought something as well. Or use - real - testimonials from recent buyers. If you don't have those yet, write a realistic testimonial yourself, but do not make it superhuman.