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 .
Effect of fruit on net acid and urinary calcium excretion in an acute feeding trial of women.
OBJECTIVE Consumption of fruits and vegetables has been implicated in lowering net acid excretion ( NAE ) , but few studies have directly examined NAE and urinary calcium effects . Further , there is no evidence that only fresh fruits and vegetables must be consumed for a beneficial effect on bone . METHODS A crossover , acute-load study was design ed to investigate whether processed fruit was as effective as fresh fruit in reducing NAE and protein-induced hypercalciuria .  Fifteen women completed three dietary treatments on three different mornings . A fasting urine sample was collected before consuming one of the following three isocaloric high-protein treatments : control , fresh apples , and processed applesauce . The serving size for the applesauce treatment was 2.5 times that for fresh apples . Urine was collected at baseline ( 0 h ) and at 1.5 , 3.0 , and 4.5 h. RESULTS Compared with baseline , NAE increased after control treatment but decreased after fresh or processed apple treatment ( P = 0.041 ) . Calcium excretion increased with all treatments by 3 h ; however , the increase was less for fresh apple and applesauce ( P = 0.024 ) . CONCLUSIONS In an acute feeding model , fruit intake reduced NAE and urinary calcium excretion . Processed fruit appears to be effective , although a larger serving size was needed than with fresh fruit
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 .