I am assuming that you are on TRT, taking 120 mg testosterone injections.
If that is the case I would recommend talking with your doctor and running it by him before starting Red Growth.
With that being said, we have seen people take Red Growth while also taking testosterone and having the two products build off of each other, possibly leading to more pronounced gains and strength than taking them separately.
But it's always important to talk with your doc whenever you are combining supplements with medically prescribed medicines. So make sure that you do that.