>>11442592Mean testosterone levels in blacks were 19% higher than in whites, and free testosterone levels were 21% higher." 1986 -
http://www.ncbi.nlm.nih.gov/pubmed/3455741DHT:testosterone ratio was highest in African-Americans, intermediate in whites, and lowest in Asian-Americans" 1995 -
http://www.ncbi.nlm.nih.gov/pubmed/8672990African-American men may be exposed to higher levels of testosterone, literally from the start, because of diet related hormonal influence" 1997 -
http://jnci.oxfordjournals.org/content/89/3/188.fullSignificantly higher serum levels of total testosterone (P<.01) and SHBG (P <.02) were found in the African American than in the Caucasian men. 2001" -
http://www.ncbi.nlm.nih.gov/pubmed/11586501Serum testosterone concentration appears to be higher in black men than white men, particularly at younger ages." 2002. -
http://www.ncbi.nlm.nih.gov/pubmed/12376505Mean total and free testosterone levels were approximately 5–12% higher in black compared with Hispanic and white men. 2008. -
http://www.ncbi.nlm.nih.gov/pmc/arti...5644/table/T2/The observation of higher bioavailable testosterone, expressed as the molar ratio of testosterone to SHBG, in the cord blood of African-American compared with white male babies" 2009 -
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3012385/Racial and ethnic differences in testosterone levels have generally been observed only in studies of younger males." -
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2435644/Black men had greater bone mineral mass, higher bone density, longer femurs, longer arm and thigh lengths and lower spine to femur ratio compared to White men."
http://onlinelibrary.wiley.com/doi/1...60215/abstractBone density was 4.5-16.1% higher for black than for white men and was 1.2-7.3% higher for black than for white women"
http://www.ncbi.nlm.nih.gov/pubmed/9024231 
