citric acid

Citric acid is an organic acid and a natural component of many fruits and fruit juices. It is not a vitamin or mineral and is not required in the diet. However, citric acid is beneficial for people with kidney stones
It inhibits stone formation and breaks up small stones that are beginning to form. Citric acid is protective; the more citric acid in your urine, the more protected you are against forming new kidney stones.
What are the best food sources of citric acid?
Citric acid is most prevalent in citrus fruits and juices. Of these fruits, lemons and limes have the most citric acid. While oranges, grapefruits, and berries also contain appreciable amounts, lemons are most significantly contribute to the citric acid content.
Citric acid makes urine less favorable for the formation of stones. In its natural form, such as from citrus fruits, it prevents small stones from becoming “problem stones” by coating them and preventing other material from attaching and building onto the stones.