Doctors say the summertime favorite is good all year for people prone to kidney stones.
"It has the stuff that stabilizes stones, but it has a lot less of the stuff that can form stones, so we tell people to drink lemonade," said Dr. Jeffrey Donohoe.
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Specifically, lemon juice has citric acid, which prevents crystal deposits in the kidneys from turning to stones.
And it's also low in oxalate, a substance that contributes to stones.
The super-sweet store-bought lemonade has less citric acid and too much sugar, so go for the homemade version.
Doctors say they're seeing more kidney stones among kids, particularly teens.