Erecerxyn , L-citrulline, cordyceps, ginseng, eleuthero and black pepper. So, these are natural ingredients, we will give it to you. At least it seems that they offer a natural formula. But can this natural formula really help testosterone and muscle growth? Well, unfortunately, none of these ingredients are clinically proven to work at the moment. A study also shows that Tribulus Terrestris, one of the main ingredients, does NOT produce significant gains in strength or muscle mass. So it is safe to say that until someone studies the Erecerxyn testosterone pills, it is worth ignoring them. Go see product no. # 1! Erecerxyn side effects Now about the side effects. We mentioned briefly that testosterone supplement Erecerxyn has NOT been studied. Many supplements like this are never studied. Because the FDA does not test products like this. So it means that we don’t know how these ingredients interact with each other or if they cause .