Subject: How would a sudden increase in Testosterone and drop in Estrogen effect me?

So im a athlete and i was reading an artical inside of a nutrition magazene 
talking about this product and how it incresed testosterone levels 
significantly and also decresed estrogen levels, I thought to myself that that 
sounded great but such an increse in testosterone cant be good and is 
defenetly not natural. What i know about testosterone from reserch is that it 
is a naturaly ocering steroid in the body, also that it builds muscle and 
increases endurance, as well as facial hair and deepening of the voice but 
what else would a massive increse in testosterone do to me?

Re: How would a sudden increase in Testosterone and drop in Estrogen effect me?