Hi, I own a small gym, where I also work as a fitness instructor for my customers. Because of my line of work, I am familiar with many nutritional supplements. I have read researches stating that Bulgarian Tribulus terrestris is very different from same plant extracts from different parts of the world. My customers and I have tried many products based on Tribulus terrestris, claiming they are of Bulgarian origin. The results were different, but in most cases, negligible. One day I came across your site and decided to try your product. I noticed that the delivery was directly from Bulgaria and I assumed this might actually be the original Bulgarian Tribulus. I was pleasantly surprised with the quality, and since then, I have been offering it to my customers too (they are very happy as well). I do believe yours is the real Bulgarian Tribulus.