Can caffeine cause kidney stones?

Can caffeine cause kidney stones?

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  1. Kidney stones are a common condition, with an estimated prevalence in the United States of 11% for men and 7% for women. Previous research highlighted the association between dietary habits and the risk of developing kidney stones; in particular, it was shown that increasing fluid intake would reduce the risk and that the consumption of certain beverages such as coffee and tea may also further reduce the risk.
    So, caffeine intake is independently associated with a lower risk of incident kidney stones.

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  2. If one becomes dehydrated it may affect kidney stone formation. Coffee and black tea and colas also contain oxalates which are no good for those who form calcium oxalate stones even if one drinks the decaffeinated type.

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  3. There are usually two types of kidney stones: calcium oxalate and uric acid.
    Calcium has a divalent cation, carrying a +2 charge. This binds quite readily to a divalent anion, carrying a -2 charge, such as oxalic acid. Excess calcium in the kidney can bind to oxalic acid if the pH of the urine is more basic above normal. Normal pH is 7.4. So, the higher the pH number the more basic the urine. For example, a pH of 7.8 is more basic than pH 7.4.
    To counteract the precipitation of calcium crystals in the kidney one wants to keep the urine more acidic, i.e., a pH of less than 7.4, e.g., 7.3, 7.1, etc. This can be accomplished with lemonade, vinegar water, or cranberry juice.
    Uric acid is a byproduct of protein metabolism/degradation. Especially in individuals that are prone to gout. The uric acid can crystallize in the kidneys or even in joints (gouty arthritis) or in soft tissues (to…

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