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Most men don’t like to hear this, but when it comes to testosterone, they hit their peak at about age 17. Levels plateau for a while, then slowly start to slide in their 30s and 40s. By the time a man reaches 80, his testosterone level will be about half of what it was when he was a strapping young lad.
For decades, doctors have used synthetic testosterone to treat a small number of men whose hormone level is unambiguously low. Hypogonadism, as it is called, can be caused by a problem in the testes (where most testosterone is made) or in the pituitary gland (the “master gland” under the brain that secretes a signaling hormone to get the testes into action).
But now a growing number of men in the United States are taking testosterone to reverse the gradual, age-related decline of the hormone, or so-called andropause. By some estimates, the number of testosterone prescriptions in the United States has tripled in recent years, and total sales now come to about $400 million a year. That’s not much compared with the $12.5 billion spent on cholesterol-lowering statins, but the upward trend is still impressive.
Men and Low-T - Blog - Testosterone replacement & general men's health articles