Tribulus is commonly stacked with other herbal testosterone supporters, anti-estrogens , cortisol blockers and the like. Personally, I like to keep it simple: Tribulus plus D-Aspartic Acid , Coleus forskohlii , Phosphatidyl Serine and Vitamin D3 . If you're 35 or older, add 200 milligrams of DHEA . Sure, there are a ton of other gadgets on the market you could add. Some of them are very cool, and new ones bubble to the surface all the time. But I've never been a fan of the kitchen sink formulations that use too little of too many ingredients.