Adult bone mass is reached between the ages of 20 and 30 years. After that, bone loss due to aging is seen in both genders. In women, bone mass decreases and increases again with each reproductive cycle. At menopause, bone mass decreases rapidly for several years, then the rate slows until the eighth and ninth decade of life, when bone is again lost because bone formation declines even further. Men experience a steadier loss throughout life. Men also show different patterns of loss at the trabecular and cortical surfaces, as well as differences in the relationship between bone formation and bone resorption. The bone mass of African-American men and women is higher than that of whites, but bone mass also decreases with aging in African-Americans
KeywordsBone Mineral Density Bone Mass Bone Density Protein Intake Estrogen Replacement Therapy
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