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Originally Posted by CiCi
I have never heard of calcium helping with dumping! That would be great! Do you think it would work with chewable calcium citrate as well? (My doc says citrate is what keeps us from getting kidney stones.)
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I had caught the rumor regarding kidney stones, too - so I went and did a little research. I'm interested because I get a kidney stone about once every ten years, and they hurt like hell! So, just to cover all bases, I take some of both - at least one 600 mg tablet of carbonate every day, and the rest of citrate. The Estroven gum I mention above is a combination, as well...
Results below:
Does Calcium Carbonate Or Too Much Calcium Cause Kidney Stones?
Until 1983 it was commonly assumed that higher calcium intake could increase kidney stone formation.
The following landmark study of 45,619 men corrected this misunderstanding by showing that men who were deficient in calcium had more calcium (oxalate) stone formation in their kidneys. It also showed that higher calcium intake reduced stones. This appears to happen because calcium can help to reduce oxalic acid absorption in the intestine by binding with oxalic acid and carrying it out of the body in the feces, so less oxalate stones form in the kidneys. Roughly 99% of kidney stones are composed of calcium oxalate.
Curhan GC, et al. A prospective study of dietary calcium and other nutrients and the risk of symptomatic kidney stones. N Engl J Med 1993 Mar 25;328(12):833-838.
Comment: This study said, ”A high dietary calcium intake is strongly suspected of increasing the risk of kidney stones. However, a high intake of calcium can reduce the urinary excretion of oxalate, which is thought to lower the risk. Less urinary excretion indicates inhibition of oxalate absorption into the body. Dietary calcium intake was inversely associated with the risk of kidney stones.’ Men who consumed the most calcium had the least potential for kidney stones. Higher dietary potassium intake and increased fluid intake were also associated with having a lower incidence of stones.
Levine RJ, et al. Trial of calcium in preeclampsia. N Eng J Med 1997;337:69-7.
Comment: This study showed no increase in kidney stones among 2295 women who took 2,000 mg of calcium carbonate per day for a study period of up to 25 weeks.
Takei K, et al. Oral calcium supplement decreases urinary oxalate excretion in patients with enteric
hyperoxaluria. Urol Int 1998;61:192-195.
Comment: This study investigated four different types of calcium supplements and said that appropriately dosed oral calcium supplementation may be ”e an effective strategy [to reduce kidney stones]e ’
Williams CP, et al. Why oral calcium supplements may reduce renal stone disease: report of a clinical pilot study. J Clin Pathol 2001;54:54-62.
Comment: 500 mg of daily calcium carbonate improved mechanisms associated with reduced kidney stones. However, this is still being investigated, and no one has reached a solid conclusion about whether calcium carbonate (or other forms of calcium) supplementation can reduce the incidence of kidney stones.