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 .
The effect of milk supplementation on bone mineral density in postmenopausal Chinese women in Malaysia
Dietary studies often report low calcium intake amongst post-menopausal Malaysian women and calcium deficiency has been implicated as part of the etiology of age-related bone loss leading to osteoporosis . Therefore , the objective of this study was to examine the effectiveness of high calcium skimmed milk ( Anlene Gold ™ , New Zeal and Milk , Wellington , New Zeal and ) to reduce bone loss in Chinese postmenopausal women . Two hundred subjects aged 55–65 years and who were more than 5 years postmenopausal were r and omized to a milk group and control group . The milk group consumed 50 g of high calcium skimmed milk powder daily , which contained 1200 mg calcium ( taken as two glasses of milk a day ) . The control group continued with their usual diet . Using repeated measures ANCOVA , the milk supplement was found to significantly reduce the percentage of bone loss at the total body compared to the control group at 24 months ( control −1.04 % , milk −0.13 % ; P<0.001 ) . At the lumbar spine , the percentage of bone loss in the control group was significantly higher ( −0.90 % ) when compared to the milk ( −0.13 % ) supplemented group at 24 months ( P<0.05 ) . Similarly , milk supplementation reduced the percentage of bone loss at the femoral neck ( control −1.21 % , milk 0.51 % ) ( P<0.01 ) and total hip ( control −2.17 % , milk −0.50 % ) ( P<0.01 ) . The supplemented group did not experience any significant weight gain over the 24 months . The serum 25-hydroxy vitamin D level improved significantly ( P<0.01 ) from 69.1±16.1 nmol/l at baseline to 86.4±22.0 nmol/l at 24 months in the milk group . In conclusion , ingestion of high calcium skimmed milk was effective in reducing the rate of bone loss at clinical ly important lumbar spine and hip sites in postmenopausal Chinese women in Malaysia . Supplementing with milk had additional benefits of improving the serum 25-hydroxy vitamin D status of the subjects
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 .