Bulgarian tribulus extract is a great supplement for building muscle mass. tribulus terrestris extract Muscle mass gains are affected by mainly and increase in testosterone. When you testosterone is increased you have a better chance at gaining muscle. That is why anabolic steroids work so well. It is because they increase the bodies amount of synthetic testosterone. However, many people chose not to take the anabolic steroid route. Instead, they look for natural supplements to increase their testosterone count inside their bodies. One of the best supplements to increase your testosterone in ones body is a supplement called Tribulusbulgarian terrestris extract. Tribulus terrestris first came to the market over 10 years ago. It was first produced in Bulgaria, and many people enjoyed muscle gains with the dietary supplements. However, since then, many people have not gotten the results they should have from this safe and natural supplements. The reason they have not gotten the results they wanted is that many companies are using cheap alternatives from China. You see the Chinese try to duplicate this tribulus from Bulgaria by using synthetic ingredients and methods to make it. Unfortunately, this leads to low-quality tribulus products. Then what happens is that these Chinese companies in turn offer their low quality tribulus to supplement companies claiming it is just as good. This results in low-quality tribulus supplements. In order to get really high quality tribulus terrestris you need to buy Bulgarian tribulus. In addition you need to make sure that you see a lab analysis.