The influence of dietary calcium and phosphorus concentration on their absorption in the cow

1967 ◽  
Vol 68 (2) ◽  
pp. 263-268 ◽  
Author(s):  
R. Manston
Keyword(s):  
Dietary Intake ◽  
Dietary Calcium ◽  
Phosphorus Concentration ◽  
Isotope Techniques ◽  
Phosphorus Absorption ◽  
Calcium And Phosphorus

Experiments were carried out in dry, nonpregnant cows by varying dietary concentrations of calcium and phosphorus. Calcium and phosphorus absorption were measured by balance and isotope techniques. It was found that absorption of calcium or phosphorus increased when the dietary intake of the element increased, but only for a few days.

Effect of Ca/P ratio and pH on calcium and phosphorus absorption from dog gut loops in vivo

1968 ◽  
Vol 46 (2) ◽  
pp. 171-173 ◽  
Author(s):  
Carl F. Cramer
Keyword(s):  
Phosphorus Concentration ◽  
Phosphorus Absorption ◽  
Calcium And Phosphorus

The effect of Ca/P ratios and pH on absorption of Ca and P was measured in vivo in dogs with healed intestinal loops. With Ca constant, variations either of P/Ca or pH did not alter Ca absorption. With no phosphorus, Ca absorption was significantly depressed. Phosphorus absorption was proportional to phosphorus concentration in this perfusate, and was depressed by a lowered pH. With a high Ca concentration, percentage Ca absorbed rose, and was unaffected by P/Ca ratio or pH. It was concluded that P/Ca ratios and pH are not important as factors which limit calcium or phosphorus absorption, in vivo, within reasonable physiologic dietary concentrations of these elements.

scholarly journals Effect of dietary calcium and phosphorus levels on growth, carcass characteristics and liver and kidney functions of growing Egyptian geese

2021 ◽  
pp. 101244
Author(s):  
Mahmoud Alagawany ◽  
Elwy Ali Ashour ◽  
Mohamed Soliman El-Kholy ◽  
Laila Ali Mohamed ◽  
Mohamed Ezzat Abd El-Hack
Keyword(s):  
Carcass Characteristics ◽  
Dietary Calcium ◽  
Liver And Kidney ◽  
Calcium And Phosphorus ◽  
Kidney Functions ◽  
Phosphorus Levels

scholarly journals Dietary Calcium Intake and Calcium Supplementation in Hungarian Patients with Osteoporosis

2013 ◽  
Vol 2013 ◽  
pp. 1-8
Author(s):  
Gábor Speer ◽  
Pál Szamosujvári ◽  
Péter Dombai ◽  
Katalin Csóré ◽  
Kinga Mikófalvi ◽  
...  
Keyword(s):  
Dietary Intake ◽  
Calcium Intake ◽  
Calcium Supplementation ◽  
Dietary Calcium ◽  
Dietary Calcium Intake ◽  
Current Recommendation ◽  
High Calcium Intake ◽  
Osteoporosis Therapy ◽  
Average Intake ◽  
High Calcium

Purpose. Adequate calcium intake is the basis of osteoporosis therapy—when this proves insufficient, even specific antiosteoporotic agents cannot exert their actions properly.Methods. Our representative survey analyzed the dietary intake and supplementation of calcium in 8033 Hungarian female and male (mean age: 68 years) (68.01 (CI95: 67.81–68.21)) patients with osteoporosis.Results. Mean intake from dietary sources was665±7.9 mg (68.01 (CI95: 67.81–68.21)) daily. A significant positive relationship could be detected between total dietary calcium intake and lumbar spine BMD (P=0.045), whereas such correlation could not be demonstrated with femoralT-score. Milk consumption positively correlated with femur (P=0.041), but not with lumbar BMD. The ingestion of one liter of milk daily increased theT-score by 0.133. Average intake from supplementation was558±6.2 mg (68.01 (CI95: 67.81–68.21)) daily. The cumulative dose of calcium—from both dietary intake and supplementation—was significantly associated with lumbar (r=0.024,P=0.049), but not with femur BMD (r=0.021,P=0.107). The currently recommended 1000–1500 mg total daily calcium intake was achieved in 34.5% of patients only. It was lower than recommended in 47.8% of the cases and substantially higher in 17.7% of subjects.Conclusions. We conclude that calcium intake in Hungarian osteoporotic patients is much lower than the current recommendation, while routinely applied calcium supplementation will result in inappropriately high calcium intake in numerous patients.

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