I researched for quite a while and communicated with a number of suppliers before selecting UKBS. Unlike other options, I felt UKBS relayed a high level of integrity and I decided to give them a try. For the record, I am a veterinarian by profession so I do have a rather broad experience with pharmaceuticals and an understanding of how the various supplements I selected should be working. I didn't have lab tests done on the products nor did I submit blood samples to monitor changes during the cycle. I did inform my primary care physician about what I was doing and I can attest that far beyond anecdotal evidence alone, every product I listed produced the results expected from a quality product. And I am confident that if I am ever appropriately dissatisfied with a purchase, UKBS will make it right.