I took tribestan brand. I felt like superman for a few weeks! Spontaneous erections...dreaming up fight scenarios...improved athletic endurance... better cognitive performance... more motivation in school....etc. Then I started getting really depressed and anxious. So.... Does tribulus actually raise T or does it work on a different mechanism? Or... Is tribestan just spiked with some kind of steroid? I know that my post-use testosterone levels were about half of what they were before I started using tribestan. No data while taking the product.