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 .
The effects of a two-year randomized, controlled trial of whey protein supplementation on bone structure, IGF-1, and urinary calcium excretion in older postmenopausal women.
The effects of dietary protein on bone structure and metabolism have been controversial , with evidence for and against beneficial effects . Because no long-term r and omized , controlled studies have been performed , a two-year study of protein supplementation in 219 healthy ambulant women aged 70 to 80 years was undertaken . Participants were r and omized to either a high-protein drink containing 30 g of whey protein ( n = 109 ) or a placebo drink identical in energy content , appearance , and taste containing 2.1 g of protein ( n = 110 ) . Both drinks provided 600 mg of calcium . Dual-energy X-ray absorptiometric ( DXA ) hip areal bone mineral density ( aBMD ) , 24-hour urinary calcium excretion , and serum insulin-like growth factor 1 ( IGF-1 ) were measured at baseline and at 1 and 2 years . Quantitative computed tomographic ( QCT ) hip volumetric bone mineral density ( vBMD ) and a femoral neck engineering strength analysis were undertaken at baseline and at 2 years . Baseline average protein intake was 1.1 g/kg of body weight per day . There was a significant decrease in hip DXA aBMD and QCT vBMD over 2 years with no between-group differences . Femoral neck strength was unchanged in either group over time . The 24-hour urinary calcium excretion increased significantly from baseline in both groups at 1 year but returned to baseline in the placebo group at 2 years , at which time the protein group had a marginally higher value . Compared with the placebo group , the protein group had significantly higher serum IGF-1 level at 1 and 2 years ( 7.3 % to 8.0 % , p < .05 ) . Our study showed that in protein-replete healthy ambulant women , 30 g of extra protein increased IGF-1 but did not have beneficial or deleterious effects on bone mass or strength . The effect of protein supplementation in population s with low dietary protein intake requires urgent attention
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 .