I wouldn't take that until atleast 25., your body is a testerone machine right now at 16. When I was 16, the only thing I took to try out was horny goat weed, but I stayed home because I could not get my boner down for the Life of me.
But to be more specific on your question, you most likely won't see sides, but you won't know until yuou try it. At that age, you might be prone to breakout with acne but again you won't know until you try it.
I'm sure you're reaching for this for what you think competitive edge, I would suggest a strong healthy protein diet with time spend in the gym. At your age, if you this, I guarantee you will grow and get bigger as your genetic genes allow you too.