What can guys do to avoid losing testerone and being feminized?

ive read a lot about tetosterone levels dropping...one radical feminist chick whose blog I've read argues that its nature weeding men out (emphasis on the radical)..but she does have a point..however it looks like its due to toxins in drinking water...and also obesity lowers testerone big time..that might be the biggest factor...i am overweight and made if my new years reosltuoin to drop some pundage and I actually have dropped 10 pounds...but imw odnering if cetain foods and stuff might keep my testerone high...i have experience any symptoms of having low testerone...but I worry that when I get older I might be in bad shape
What can guys do to avoid losing testerone and being feminized?
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