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 .
Possible site-specific effect of an intervention combining nutrition and lifestyle counselling with consumption of fortified dairy products on bone mass: the Postmenopausal Health Study II
The aim of the present study was to examine whether a holistic approach combining nutrition and lifestyle counselling with the consumption of milk and yoghurt enriched with calcium , vitamin D3 and phylloquinone ( vitamin K1 ) or menaquinone ( vitamin K2 ) would have any additional benefit on bone mineral density ( BMD ) indices measured at various skeletal sites using two different techniques , dual energy X-ray absorptiometry and quantitative ultrasonography ( QUS ) . A sample of 115 postmenopausal women were r and omized to three intervention groups , receiving daily via fortified milk and yoghurt and for 12 months , 800 mg calcium and 10 μg vitamin D3 ( CaD group , n = 26 ) ; 800 mg calcium , 10 μg vitamin D3 and 100 μg vitamin K1 ( CaDK1 group , n = 26 ) ; 800 mg calcium , 10 μg vitamin D3 and 100 μg vitamin K2 ( CaDK2 group , n = 24 ) ; and a control group ( CO group , n = 39 ) following their usual diet . All three intervention groups attended biweekly nutrition and lifestyle counselling sessions . Total BMD significantly increased in all three intervention groups and these changes were significantly higher compared to the CO ( P < 0.001 ) . Furthermore , the significant increases observed for L2–L4 BMD in the CaDK1 and CaDK2 groups were found to be significantly higher compared to the decrease observed in the CO ( P = 0.001 ) . No significant differences were observed for QUS parameters . The combined approach used in the current study led to favourable changes for all three intervention groups in total body BMD , while an additional benefit was observed for L2–L4 BMD in CaDK1 and CaDK2 groups . No significant differences were observed among groups in any of the QUS parameters
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 .