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 .
Body composition and strength changes in women with milk and resistance exercise.
PURPOSE We aim ed to determine whether women consuming fat-free milk versus isoenergetic carbohydrate after resistance exercise  would see augmented gains in lean mass and reductions in fat mass similar to what we observed in young men . METHODS Young women were r and omized to drink either fat-free milk ( MILK : n = 10 ; age ( mean + /- SD ) = 23.2 + /- 2.8 yr ; BMI = 26.2 + /- 4.2 kg x m(-2 ) ) or isoenergetic carbohydrate  ( CON : n = 10 ; age = 22.4 + /- 2.4 yr ; BMI = 25.2 + /- 3.8 kg x m(-2 ) ) immediately after and 1 h after exercise ( 2 x 500 mL ) . Subjects exercised 5 d x wk(-1 ) for 12 wk . Body composition changes were measured by dual-energy x-ray absorptiometry , and subjects ' strength and fasting blood were measured before and after training . RESULTS CON gained weight after training ( CON : + 0.86 + /- 0.4 kg , P < 0.05 ; MILK : + 0.50 + /- 0.4 kg , P = 0.29 ) . Lean mass increased with training in both groups ( P < 0.01 ) , with a greater net gain in MILK versus CON ( 1.9 + /- 0.2 vs 1.1 + /- 0.2 kg , respectively , P < 0.01 ) . Fat mass decreased with training in MILK only ( -1.6 + /- 0.4 kg , P < 0.01 ; CON : -0.3 + /- 0.3 kg , P = 0.41 ) . Isotonic strength increased more in MILK than CON ( P < 0.05 ) for some exercises . Serum 25-hydroxyvitamin D increased in both groups but to a greater extent in MILK than CON ( + 6.5 + /- 1.1 vs + 2.8 + /- 1.3 nM , respectively , P < 0.05 ) , and parathyroid hormone decreased only in MILK ( -1.2 + /- 0.2 pM , P < 0.01 ) . CONCLUSIONS Heavy , whole-body resistance exercise with the consumption of milk versus carbohydrate in the early postexercise period result ed in greater muscle mass accretion , strength gains , fat mass loss , and a possible reduction in bone turnover in women after 12 wk . Our results , similar to those in men , highlight that milk is an effective drink to support favorable body composition changes in women with resistance training
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 .