PureGen was started out of a need for transparency in the NMN and Resveratrol industry. As consumers ourselves, we were frustrated with how difficult it was to find these compounds in a pure form for a reasonable price. Very few companies are selling a pure product. Almost none are actually showing legitimate third party test results. So, we wanted to make things really simple. We contacted one of the biggest manufacturers in the world for NMN and Trans-Resveratrol. We purchase directly from them and every batch that we receive goes off for testing here in the US at a well known laboratory. Those test results are then posted right here on our website for everyone to see. It's as simple as that. Total transparency.