What are the adverse effects of taking a testosterone booster at 17?

Lots . . .: First, understand there are no over-the-counter testosterone boosters. So if you take some dietary supplement that promises to boost your t, you'll lose money at best, and possible risk your health at worse since the manufacturers aren't required to prove safety & effectiveness prior to making miraculous claims as long as they include the usual fda disclaimer. So don't bother. It's not worth it.