Declining testosterone levels in men over 45 is common1 and is often the cause of erectile dysfunction (ED). Androgen deficiency, or hypogonadism, affects roughly 40% of men aged 45 or older.2
Two-thirds of these men present with symptoms. While some symptoms, like ED, indicate deficiency, additional symptoms can be similar to those of other diseases, such as cardiovascular disease.2 Tests for free, bioavailable, and total testosterone are essential to help diagnose hypogonadism and rule out other conditions. For those who may be candidates for testosterone therapy, as well as for those already on therapy, testing can also help assess and monitor testosterone levels.