E330 — Citric acid

Citric acid: an acid found naturally in citrus fruits and formed in the body's own energy metabolism (the citric acid cycle); the additive is made by fermenting sugars with the mould Aspergillus niger. It adds sourness, regulates acidity and helps antioxidants work by binding metals. JECFA set no limit on its acceptable daily intake (ADI not limited), and the EU authorises it in most foods with no fixed maximum level (quantum satis).