Fig. 1. Changes in bone mass in women (arbitrary units) with age. Principal influences on bone mass are genetics, hormonal status, mechanical loading and Ca intake (throughout life) and structural errors (mostly later in life). Ca = calcium, PBM = peak bone mass.
Fig. 2. Total body calcium (mean ± SD) measured by dual energy X-ray absorptiometry over a one-year period in 364 teenage girls progressing from pubertal stage 2 to 3. (Adapted from [10].)
Fig. 3. Individual responses in calcitropic hormones at day 4 in response to graded intakes of dietary protein (n = 8 healthy young women). The order of treatments was randomized. The upper limits of normal are represented by horizontal dashed lines. NcAMP = nephrongenous cyclic adenosine monophosphate, a bioindicator of PTH activity. GF = glomerular filtration. (Reproduced with permission from [241].)
