Supplements like protein shakes and bars have been flooding the U.S. and international health-food markets for over a decade now, and they are available in almost every supermarket around America. But are they effective in building muscle and if so, how do they work?
Your body uses protein for many processes, from the release and regulation of hormones (including testosterone) to the building of many important bodily tissues, from bone and skin to — you guessed it — muscle. About 16% of your body weight is made up of protein, but the human body has no readily-available way to store it (unlike less-popular fat).