Urine calcium excretion rates were consistent with osteoporosis development ; however calcium balance studies did not demonstrate loss of whole body calcium with higher net acid excretion .
No study revealed a biologic mechanism functioning at physiological pH. Finally , r and omized studies did not provide evidence for an adverse role of phosphate , milk , and grain foods in osteoporosis .
Conclusions A causal association between dietary acid load and osteoporotic bone disease is not supported by evidence and there is no evidence that an alkaline diet is protective of bone health
Background Modern diets have been suggested to increase systemic acid load and net acid excretion .
In response , alkaline diets and products are marketed to avoid or counteract this acid , help the body regulate its pH to prevent and cure disease .
The objective of this systematic review was to evaluate causal relationships between dietary acid load and osteoporosis using Hill 's criteria .
Protein intake: effects on bone mineral density and the rate of bone loss in elderly women.
BACKGROUND The role of dietary protein in bone metabolism is controversial . OBJECTIVE We investigated the associations of dietary protein intake with baseline bone mineral density ( BMD ) and the rate of bone loss over 3 y in postmenopausal elderly women . DESIGN Women aged 65 - 77 y ( n = 489 ) were enrolled in an osteoporosis intervention trial . We studied the associations of protein intake as a percentage of energy with baseline BMD and the rate of bone loss in 96 women in the placebo group ( n = 96 ) . We also examined the effect of the interaction of dietary  calcium  intake with protein intake on BMD . RESULTS In the cross-sectional study , a higher intake of protein was associated with higher BMD . BMD was significantly higher ( P < 0.05 ) in the spine ( 7 % ) , midradius ( 6 % ) , and total body ( 5 % ) in subjects in the highest quartile of protein intake than in those in the lower 2 quartiles . This positive association was seen in women with calcium intakes > 408 mg/d . There was no significant effect of protein intake on hip BMD . In the longitudinal study of the placebo group , there was no association between protein intake and the rate of bone loss . CONCLUSIONS The highest quartile of protein intake (: 72 g/d ) was associated with higher BMD  in elderly women at baseline only when the calcium intake exceeded 408 mg/d . In the longitudinal study , no association was seen between protein intake and the rate of bone loss , perhaps because the sample size was too small or the follow-up period of 3 y was not long enough to detect changes
Urine calcium excretion rates were consistent with osteoporosis development ; however calcium balance studies did not demonstrate loss of whole body calcium with higher net acid excretion .
No study revealed a biologic mechanism functioning at physiological pH. Finally , r and omized studies did not provide evidence for an adverse role of phosphate , milk , and grain foods in osteoporosis .
Conclusions A causal association between dietary acid load and osteoporotic bone disease is not supported by evidence and there is no evidence that an alkaline diet is protective of bone health
Background Modern diets have been suggested to increase systemic acid load and net acid excretion .
In response , alkaline diets and products are marketed to avoid or counteract this acid , help the body regulate its pH to prevent and cure disease .
The objective of this systematic review was to evaluate causal relationships between dietary acid load and osteoporosis using Hill 's criteria .