What compound in lemons inhibits the formation of calcium oxalate kidney stones?

Citrate

One of the most scientifically supported reasons for incorporating lemons into a daily routine is the prevention of kidney stones, specifically calcium oxalate stones, which are the most common type. Lemons possess a high concentration of citrate. Citrate functions by binding to calcium within the urine. This binding action effectively prevents the calcium from linking up with oxalate to form crystalline structures, thus inhibiting the nucleation and growth of stones. By simultaneously increasing urine volume through hydration and boosting citrate levels, the daily habit creates a urinary environment that is substantially less favorable for the precipitation of these painful mineral deposits.