Significant differences in serum steroid hormone levels have been observed in middle-aged African-Caribbean and European men

Compared with Europeans, African-Caribbean men presented significantly higher serum levels of measured bioavailable testosterone, 4-androstenedione, and estrone whatever the age group, of 5-androstenediol in those 40 to 49 and 50 to 59, and of testosterone and dihydrotestosterone in those aged 40 to 49. In contrast, European men aged 40 to 69 showed significantly higher serum levels of dehydroepiandrosterone and dehydroepiandrosterone sulfate.