I tried this product for the first time, at first I was skeptical because I had used another brand before with no results. After taking the product now for almost 2 weeks i can tell you that it makes a bug difference in my workouts and my weight loss goals. BF Vigor has allowed me to make my workouts more intense and it has reduced my muscle fatigue that I used to experience during workouts. It has also suppressed my appetite which has helped me reach my goals. I can definitely muscle gains and i have dropped a pant size in the past month thanks the BF Vigor. As far as libido and performance, that has improved as well. so all around I feel better, look better and I am excited about reaching my other health goals with this testo booster sup.