
Not at all. Avg test levels for adult men are between 400 and 1200 ng/dl, and this range makes very little difference in how much muscle one can build naturally. You only see crazy results upwards of 2000 ng/dl. Adding 100 or 200 to your base test isn’t going to make hardly any difference
Introducing exogenous testosterone will suppress and lower your endogenous no matter the dose, and also wouldn’t it actually be worse since he wouldn’t even be at a testosterone replacement level, just basically giving himself low testosterone levels due to how little exogenous he’s introducing?