Kidney Stones a New Risk for Coffee Drinkers

Individuals who are prone to kidney stones or who ingest large amounts of coffee should limit their caffeine intake, according to study results.

Researchers gave a dose of caffeine equivalent to that found in two cups of coffee to participants who had a history of kidney stones. Following ingestion of the caffeine, the subjects showed more calcium in their urine; this puts them at a higher risk of forming kidney stones.

Yahoo News
Mercola.com