In older people with osteoporosis , higher protein intake ( ≥ 0.8-g/kg body weight/day , i.e. , above the current RDA ) is associated with higher BMD , a slower rate of bone loss , and reduced risk of hip fracture , provided that dietary calcium intakes are adequate .
Intervention with dietary protein supplements attenuate age-related BMD decrease and reduce bone turnover marker levels , together with an increase in IGF-I and a decrease in PTH .
There is no evidence that diet-derived acid load is deleterious for bone health .
Thus , insufficient dietary protein intakes may be a more severe problem than protein excess in the elderly .
A summary of systematic review s and meta-analyses addressing the benefits and risks of dietary protein intakes  for  bone health in adults suggests that dietary protein levels even above the current RDA may be beneficial in reducing bone loss and hip fracture risk , provided calcium intakes are adequate .
Several systematic review s and meta-analyses have addressed the benefits and risks of dietary protein intakes for bone health in adults .
Adequate supplies of dietary protein are required for optimal bone growth and maintenance of healthy bone .
Variation in protein intakes within the “ normal ” range accounts for 2–4 % of BMD variance in adults .
Bone mineral density in postmenopausal Chinese women treated with calcium fortification in soymilk and cow's milk
Summary Eighteen months of daily consumption of milk containing 250 mg calcium prevented bone mineral density ( BMD ) loss at the hip and the femoral neck in postmenopausal Chinese women aged 45 to 65 . Introduction Estrogen-related bone loss in postmenopausal women can be prevented by the consumption of milk with high doses of calcium and soymilk with high doses of isoflavones . However , high doses of calcium and isoflavones may not be necessary to attain a beneficial effect of milk and soymilk on BMD . We hypothesized that BMD will increase in postmenopausal Chinese women who consume daily 250 mg calcium in milk or soymilk . Milk prevented bone loss at the hip and the femoral neck in postmenopausal Chinese women . Methods A total of 141 eligible Chinese women without osteoporosis , aged 45–65 , and postmenopausal for more than 2 years were r and omized into groups receiving for 18 months ( A ) milk with 250 mg calcium daily , ( B ) soymilk with 250 mg calcium daily , or ( C ) neither milk nor soymilk . Dual-energy X-ray absorptiometry measured the BMD of the spine and hip at 0 , 6 , 12 , and 18 months . Results The BMD in the hip ( 2.52 % ) and the femoral neck ( 2.82 % ) of the women consuming milk was significantly higher ( hip , P = 0.01 ; femoral neck , P < 0.0000001 ) . The women in the control group experienced a reduction in BMD at all sites ; the reduction in BMD was only significant at the hip during 12 months ( P = 0.008 ) and at the femoral neck during 18 months ( P = 0.005 ) . Conclusions Daily consumption of milk containing 250 mg calcium over 18 months prevents BMD loss at the hip and the femoral neck in postmenopausal Chinese women
In older people with osteoporosis , higher protein intake ( ≥ 0.8-g/kg body weight/day , i.e. , above the current RDA ) is associated with higher BMD , a slower rate of bone loss , and reduced risk of hip fracture , provided that dietary calcium intakes are adequate .
Intervention with dietary protein supplements attenuate age-related BMD decrease and reduce bone turnover marker levels , together with an increase in IGF-I and a decrease in PTH .
There is no evidence that diet-derived acid load is deleterious for bone health .
Thus , insufficient dietary protein intakes may be a more severe problem than protein excess in the elderly .
A summary of systematic review s and meta-analyses addressing the benefits and risks of dietary protein intakes  for  bone health in adults suggests that dietary protein levels even above the current RDA may be beneficial in reducing bone loss and hip fracture risk , provided calcium intakes are adequate .
Several systematic review s and meta-analyses have addressed the benefits and risks of dietary protein intakes for bone health in adults .
Adequate supplies of dietary protein are required for optimal bone growth and maintenance of healthy bone .
Variation in protein intakes within the “ normal ” range accounts for 2–4 % of BMD variance in adults .