Longitudinal data indicates that peak bone mass in
males and females is acquired by the end of the second
or early in the third decade of life [22]. Thereafter, bone
loss usually commences in the third decade [23] with
age-related losses in bone mineral density (BMD) in the
order of 0.5% to 1.0% per year, depending on the skeletal
site, in men up to about the age of 50 years and in
premenopausal women