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 .
Phosphate deposition capacity of athletes during hypokinesia, phosphate loading, and ambulation
Hypokinesia ( diminished movement ) induces significant phosphate ( P ) excretion ; however , little is known about the P deposition ability of the body during hypokinesia ( HK ) . Using P loads , the aim of this study was to establish the deposition ability of the body to retain P during prolonged HK . Studies were done during a 30-d period of pre-HK and a 364-d period of HK . Forty male trained athletes aged 24.7 ± 8.0 yr were chosen as subjects . They were equally divided into four groups : unloaded ambulatory control subjects ( UACS ) , unloaded hypokinetic subjects ( UHKS ) , loaded ambulatory control subjects ( LACS ) , and loaded hypokinetic subjects ( LHKS ) . All hypokinetic subjects were limited to an average walking distance of 0.7 km/d . Loading tests with 85.0 mg of calcium phosphate/kg body weight were performed on the LACS and LHKS.Fecal P loss , urinary calcium ( Ca ) and P loss , serum P , Ca , and the ionized calcium ( CaI ) levels increased significantly ( p≤0.05 ) in the LHKS and UHKS groups when compared with the LACS and UACS groups , respectively . Serum intact parathyroid hormone ( iPTH ) and the 1,25-dihydroxyvitamin D3 [ 1,25-(OH)2 D3 ] levels decreased significantly ( p≤0.05 ) in the LHKS and UHKS groups when compared with the LACS and UACS groups , respectively . After the P load , significant ( p≤0.05 ) differences were observed between LHKS and UHKS groups regarding serum , urinary , and fecal P changes . Thus , the deposition capacity of P decreased significantly ( p≤0.05 ) more in the LHKS group than in the UHKS group . The deposition of P , fecal P , urinary P and Ca , serum CaI , P , Ca , 1,25-(OH)2 D3 , and iPTH changed insignificantly ( p>0.05 ) in control groups when compared with their baseline values . It was shown that after the P load , significant differences were observed between the loaded and unloaded hypokinetic subjects regarding serum , urinary , and fecal P values and P retention . The oral P load intensified P loss from the body . It was concluded that the higher the P intake increased the greater P loss and the lower P deposition and thus the less likely it is for the P load to benefit hypokinetic subjects
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 .