Citric Acid is a naturally occurring preservative which can be found in citrus fruits. Produced as a result of the fermentation of sugar, it has a tart to bitter taste.
Citric Acid extends shelf life by adjusting the acidity or Ph of food, and it can also help enhance flavours. It works especially well with other fruits, providing a fresh taste.
Citric Acid is often used as an emulsifier to keeps fats and liquids from separating. It is also a common component in spherification where it may be used as an acid buffer.