There are no particular foods or drinks which actually cause kidney stones.
The majority of people are not prone to kidney stones and no matter what they eat or drink, they will not get kidney stones.
Dehydration is also not a cause of kidney stones. Many people who live in very hot climates and drink very little will never get a stone.
The cause of the vast majority of kidney stones is thought to be a genetic predisposition based on an individual's urine chemistry. Some people's urine contains chemicals in particular concentrations which increases their chance of developing a stone.
It is very difficult to modify a person's urine chemistry. Dietary modification (eg decreasing intake of oxalate) has little if any impact on the actual risk of developing kidney stones.
Increasing urine output by drinking more fluid has been prven to reduce the risk of kidney stone formation. It does not matter what fluids are consumed (water is no better than tea, milk, juice etc).
There is reasonable vidence that some dietary advice is beneficial, but only to patients who are prone to kidney stones. Advice includes increasing dietary calcium and reducing salt intake.
For those who have never developed a kidney stone, there is no need to increase fluid intake ( ie drink when thirsty) and no need for dietry modification.
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