One of the best ways to build muscles is to boost your testosterone level. And this is made possible if you take testosterone supplement. However, there is a wide variety of testosterone supplements on the market and there are even those that are illegal. Look only for testosterone supplement that is legitimate and perfectly legal. Testosterone supplements are intended to increase the testosterone production of our body and they are quite expensive. In this regard, you donâ€™t want to be wasting money and pay hundreds of dollars to any product that will not deliver the expected results. It is true that protein supplements help build muscles but nothing works more efficiently than testosterone supplements. So if you really want to build more muscle and achieve greater results, look for the best testosterone supplement on the market.