Citric acid is a weak organic acid that occurs naturally in citrus fruits. It is mainly used as food flavouring and preservative. As the name suggest, it has a sharp citric flavour like lemon and can be used as its substitute. If you are suffering from kidney stones, citric acid is an effective treatment because it affects the urine’s citric balance. Drinking powdered citric acid or lemon can even help prevent the stones from growing. Because of its restorative powers, citric acid can cure belching, bloating and heartburn, among many other illnesses. The high concentration of citric acids aids in proper digestion and improving bowel movements to prevent constipation. INGREDIENTS Citric Acid. MANUFACTURER CONTACT INFORMATION TRS LTD., Southbridge Way, The Green, Southall, Middlesex UB2 4AX, UK. See moreTRS Citric Acid 300 gms.