Citric acid is a common preservative used in sexual lubricants, foods, pharmaceuticals and other products. In lubes, it is typically used to maintain an appropriate pH balance.

While citric acid can cause unpleasant effects in large quantities, it is completely safe in personal lubricants and rarely causes reactions. However, people with citrus allergies may experience discomfort and swelling when exposed to a relatively small amount of citric acid and should avoid products with this ingredient.