Sodium, Calcium and You
Posted: Wed Apr 16, 2008 1:25 pm
Greetings All,
This article came out today and is another one that supports the sodium guidelines I recommend.
The calcium recommendations in the USA are high not just because of the high animal protein we consume but also because of the high salt levels in our diets.
Notice that there was a negative calcium balance on the high sodium diet, even with a high calcium intake.
The level of sodium on the high salt diet is similar to the level we consume in this country and the level of sodium on the low sodium diet is similar to where you would be if you followed my guidelines and those of Dr Mcd
- Ensure adequate calcium from plant foods
- Minimize/Eliminate animal protein
- Limit Added Sodium
In Health
Jeff
Sodium and Bone Health: The Impact of Moderately High and Low Salt Intakes on Calcium Metabolism in Postmenopausal Women.J Bone Miner Res. 2008 Apr 14;PMID: 18410231
Abstract
High salt intake is a well-recognised risk factor for osteoporosis because it induces calciuria, but the effects of salt on calcium metabolism and the potential impact on bone health in postmenopausal women have not been fully characterised.
The present study investigated adaptive mechanisms in response to changes in salt and calcium intake in postmenopausal women.
Eleven women completed a randomised cross-over trial consisting of four successive five week periods of controlled dietary intervention, each separated by a minimum 4 week washout. Moderately low and high calcium (518 mg versus 1284 mg) and salt (3.9 g versus 11.2 g) diets, reflecting lower and upper intakes in postmenopausal women consuming a Western-style diet, were provided. Stable isotope labelling techniques were used to measure calcium absorption and excretion, compartmental
modelling was undertaken to estimate bone calcium balance, and biomarkers of bone formation and resorption were measured in blood and urine.
Moderately high salt intake (11.2 g/d) elicited a significant increase in urinary calcium excretion (p = 0.0008) and significantly affected bone calcium balance with the high calcium diet (p = 0.024). Efficiency of calcium absorption was higher following a period of moderately low calcium intake (p < 0.05) but was unaffected by salt intake. Salt was responsible for a significant change in bone calcium balance, from positive to negative, when consumed as part of a high calcium diet, but with a low calcium intake the bone calcium balance was negative on both high and low salt diets.
This article came out today and is another one that supports the sodium guidelines I recommend.
The calcium recommendations in the USA are high not just because of the high animal protein we consume but also because of the high salt levels in our diets.
Notice that there was a negative calcium balance on the high sodium diet, even with a high calcium intake.
The level of sodium on the high salt diet is similar to the level we consume in this country and the level of sodium on the low sodium diet is similar to where you would be if you followed my guidelines and those of Dr Mcd
- Ensure adequate calcium from plant foods
- Minimize/Eliminate animal protein
- Limit Added Sodium
In Health
Jeff
Sodium and Bone Health: The Impact of Moderately High and Low Salt Intakes on Calcium Metabolism in Postmenopausal Women.J Bone Miner Res. 2008 Apr 14;PMID: 18410231
Abstract
High salt intake is a well-recognised risk factor for osteoporosis because it induces calciuria, but the effects of salt on calcium metabolism and the potential impact on bone health in postmenopausal women have not been fully characterised.
The present study investigated adaptive mechanisms in response to changes in salt and calcium intake in postmenopausal women.
Eleven women completed a randomised cross-over trial consisting of four successive five week periods of controlled dietary intervention, each separated by a minimum 4 week washout. Moderately low and high calcium (518 mg versus 1284 mg) and salt (3.9 g versus 11.2 g) diets, reflecting lower and upper intakes in postmenopausal women consuming a Western-style diet, were provided. Stable isotope labelling techniques were used to measure calcium absorption and excretion, compartmental
modelling was undertaken to estimate bone calcium balance, and biomarkers of bone formation and resorption were measured in blood and urine.
Moderately high salt intake (11.2 g/d) elicited a significant increase in urinary calcium excretion (p = 0.0008) and significantly affected bone calcium balance with the high calcium diet (p = 0.024). Efficiency of calcium absorption was higher following a period of moderately low calcium intake (p < 0.05) but was unaffected by salt intake. Salt was responsible for a significant change in bone calcium balance, from positive to negative, when consumed as part of a high calcium diet, but with a low calcium intake the bone calcium balance was negative on both high and low salt diets.