For guys without hypogonadism, a wait-and-see approach may make the most sense. "We just don't have the data to prove that raising testosterone in men who already have normal levels confers any real benefit," says Dr. Robert Mordkin , a urologist in Arlington, Virginia. Furthermore, Mordkin adds, "Natural waxes and wanes of testosterone as we age may have some not yet entirely understood protective effects." In addition to making us better fathers, as the Northwestern study infers, declining testosterone "may lower our vulnerability to prostate cancer at a time in our lives when we're at the greatest risk for it." That said, if you have classic symptoms of hypogonadism – low libido, fatigue, erectile dysfunction – "it's probably reasonable to check your testosterone. And for those guys whose blood levels come under definitions of low testosterone, it's probably reasonable to try the therapy for a while. But that's very different from saying testosterone is the fountain of youth."
All steroid hormones are derived from cholesterol. Contrary to popular belief, “steroid hormone” does not equate with “anabolic hormone”. Not only testosterone but estrogen and progesterone are steroid hormones derived from cholesterol. And most cholesterol in your body is produced by your liver, not from your diet. I know of no controlled studies showing that eating steaks increases testosterone levels. OTOH dietary cholesterol is no longer considered to be the great evil it used to be seen as, so go ahead and eat whole eggs if you like them. The theory that eating red meat makes you more of a man is promoted by people who just happen to like red meat. (There’s nothing wrong with liking red meat, just don’t pretend it has magical powers that it doesn’t have.)