
With modern pollution and modern sleep habits, men should avoid things that can lower testosterone levels, i.e. soy. Testosterone aids much more than muscle, such as motivation and focus. Saying soy "just" lowers sperm count is like saying smoking weed "just" makes a guy impotent.
http://www.t-nation.com/readArticle.do?id=459516
Contrary to popular belief, cultural observation tells us that most traditional cuisines — even Asian — don't incorporate soy as a staple.
The average soy intake in East Asian populations is between 40 to 90 grams per day (1.5 to 3 ounces). Folks, that's totalsoy intake, not grams of soy protein. This amount of soy equates to roughly 10 to 20 grams of soy protein per day, which is actually less than the daily allowance of protein recommended by the FDA.
Contrary to popular belief, cultural observation tells us that most traditional cuisines — even Asian — don't incorporate soy as a staple.
The average soy intake in East Asian populations is between 40 to 90 grams per day (1.5 to 3 ounces). Folks, that's totalsoy intake, not grams of soy protein. This amount of soy equates to roughly 10 to 20 grams of soy protein per day, which is actually less than the daily allowance of protein recommended by the FDA.