There appears to be little benefit of increasing protein intake for bone health in healthy adults but there is also clearly no indication of any detrimental effect , at least within the protein intakes of the population s studied ( around 0.8–1.3 g/Kg/day ) .
We undertook a systematic review and meta- analysis of published papers assessing  dietary protein and bone health .
We found little benefit of increasing protein intake for  bone health in healthy adults but no indication of any detrimental effect , at least within the protein intakes of the population s studied .
This systematic review and meta- analysis analysed the relationship between dietary protein and bone health across the life-course .
Soy protein has a greater effect on bone in postmenopausal women not on hormone replacement therapy, as evidenced by reducing bone resorption and urinary calcium excretion.
Recent reports suggest that soy protein may reduce the risk of osteoporosis in peri- and postmenopausal women . The objective of this study was to examine whether soy supplementation exerts beneficial effects on serum and urinary biomarkers of bone metabolism in postmenopausal women , regardless of whether or not they are on hormone replacement therapy ( HRT ) . A total of 71 women were r and omly assigned to either soy protein ( SP ) or milk-based protein ( MBP ) , 40 g daily for 3 months , in a double-blind parallel design . Forty-two women completed the study ( 20 on SP and 22 on MBP ) . Overall , both protein supplements positively influenced serum IGF-I , known to correlate with bone formation . However , SP had a more pronounced effect on IGF-I than MBP . Urinary deoxypyridinoline ( Dpd ) excretion , a specific biomarker of bone resorption , was significantly reduced by SP , but not by MBP when all women were included . Furthermore , women on MBP experienced a 33 % increase in urinary calcium excretion , whereas SP did not have such an effect . To evaluate whether SP affects women differently on the basis of their HRT status , data from women on HRT ( n = 22 ) and those not on HRT ( n = 20 ) were analyzed separately . The sub analysis of the data indicated that SP had the greatest impact on serum IGF-I ( an increase of 97 % ) in the women not on HRT . The changes in urinary Dpd due to SP were only observed in women not on HRT , indicating that the overall decrease in Dpd occurred with SP in the absence of HRT . These results indicate that soy protein may positively influence bone and calcium homeostasis in postmenopausal women , particularly those not on HRT
There appears to be little benefit of increasing protein intake for bone health in healthy adults but there is also clearly no indication of any detrimental effect , at least within the protein intakes of the population s studied ( around 0.8–1.3 g/Kg/day ) .
We undertook a systematic review and meta- analysis of published papers assessing  dietary protein and bone health .
We found little benefit of increasing protein intake for  bone health in healthy adults but no indication of any detrimental effect , at least within the protein intakes of the population s studied .
This systematic review and meta- analysis analysed the relationship between dietary protein and bone health across the life-course .