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 .
Gender-specific associations between soy and risk of hip fracture in the Singapore Chinese Health Study.
Although there is some epidemiologic evidence that soy may reduce risk of osteoporotic fracture in women , it is not known whether this risk reduction also occurs for men . The authors examined gender-specific associations between soy intake and hip fracture risk in the Singapore Chinese Health Study , a prospect i ve cohort of 63,257 Chinese living in Singapore . At recruitment between 1993 and 1998 , each subject was administered a food frequency question naire and questions on medical history and lifestyle factors . As of December 31 , 2006 , 276 incident cases of hip fracture in men and 692 cases in women were identified via linkage with hospital discharge data bases . For both genders , hip fracture risk was positively associated with cigarette smoking and was inversely associated with body mass index . There was a statistically significant association of tofu equivalents , soy protein , and isoflavones with hip fracture risk among women but not among men . Compared with women in the lowest quartile of intakes for tofu equivalents ( < 49.4 g/day ) , soy protein ( < 2.7 g/day ) , and isoflavones ( < 5.8 mg/1,000 kcal/day ) , those in the second-fourth quartiles exhibited 21%-36 % reductions in risk ( all P < 0.036 ) . Risk levels were comparable across the second , third , and fourth quartiles of soy intake categories
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 .