Is Coffee Risk of Kidney Stone?

Epidemiological studies linking coffee and caffeine intake in the risk of kidney stone formation have been contradictory.

Coffee, a popular and social beverage all over the world, particularly in the West, is a drink made from roast bean from the Coffea plant, native to tropical Africa and Madagascar.

A kidney stone is a deposit of insoluble calcium compounds in the kidney, affecting over 10% of the world population, according to the statistic.

According to the Warsaw Agricultural University, coffee and tea consumed daily and regularly expressed an increased risk of kidney stone by more than 80% in compared to the risk of other factors, probably due to the presence of oxalates found in coffee.

In fact, in the analyzed nutritional habits of 22 stone formers with special regard to oxalate content as one of the main nutritional lithogenic factors associated with kidney stones, researchers found that risk of kidney stone increased substantially for men and women if dietary oxalate intake was over 354 mg and 406 mg, respectively

Contrastively, a prospective study in investigated relation between intake of 21 different beverages and risk of symptomatic kidney stones in a cohort of 45,289 men, 40-75 years of age conducted by the Harvard School of Public Health, suggested that the risk of stone formation decreased by 10%. of the amount for each 240-ml (8-oz) serving consumed daily in caffeinated coffee.



Other, in the analyzed association between intake of caffeine and incidence of kidney stones in 3 large ongoing cohort studies, and the Nurses' Health Studies (NHS) I and II also found a contradictory result in related to coffee and other plant base caffeine products.

In a total of 217,883 participants; over a median follow-up of >8 y, 4982 incident cases of kidney stone occurred studies, researchers file the following results.
1. The highest quintile of caffeine intake (95% CI: 12%, 38%) showed a significantly reduced risk of developing stones by 26%, according to the Health Professionals Follow-Up Study (HPFS).
2. Caffeine ink showed a 29 % lower risk in the NHS I cohort, and
3. and 31% lower risk in the NHS II cohort

Dr. the lead author said. "Among 6033 participants with 24-h urine data, the intake of caffeine was associated with higher urine volume, calcium, and potassium and with lower urine oxalate and supersaturation for calcium oxalate and uric acid".


Taking all together, the findings demonstrated a contradictory result between caffeine and caffeinated and decaffeinated coffee intake and risk of formation of kidney stones, therefore, a cohost with large sample size study is warranted.

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Author Biography
Kyle J. Norton (Scholar, Master of Nutrition, All right reserved)
Health article writer and researcher; Over 10.000 articles and research papers have been written and published online, including worldwide health, ezine articles, article base, health blogs, self-growth, best before it's news, the karate GB daily, etc.,.
Named TOP 50 MEDICAL ESSAYS FOR ARTISTS & AUTHORS TO READ by Disilgold.com Named 50 of the best health Tweeters Canada - Huffington Post
Nominated for shorty award over last 4 years
Some articles have been used as references in medical research, such as international journal Pharma and Bioscience, ISSN 0975-6299.

Sources
(1) Tea and coffee as the main sources of oxalate in diets of patients with kidney oxalate stones by Gasińska A1, Gajewska D.(PubMed)
(2) Caffeine intake and the risk of kidney stones by Ferraro PM1, Taylor EN1, Gambaro G1, Curhan GC1.(PubMed)
(3) Prospective study of beverage use and the risk of kidney stones by Curhan GC1, Willett WC, Rimm EB, Spiegelman D, Stampfer MJ.(PubMed)