![]() After reaching a peak level, testosterone levels declined earlier in blacks than in whites. Testosterone levels increased rapidly with age and reached higher and earlier peak levels in black males compared to white males at 20–30 years of age. ![]() Overall, between the ages of 12 and 15, black males had lower testosterone levels than white males. We analyzed data from the 1999–2004 National Health and Nutritional Examination Survey to compare age-related variations in the testosterone levels of 355 black and 631 white males. We examined age-related variations of testosterone levels among black and white males, which may provide important insights into racial disparities in PCa incidence and mortality. The magnitude of the age-related declines in testosterone rather than levels measured at single point in time may be related to the genesis of prostate cancer (PCa).
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