Oral rehydration salts (ORS) are used to treat dehydration from diarrhea. The standard WHO ORS formula contains sodium, potassium, chloride, citrate and glucose to replace water and electrolytes lost from diarrhea. A new WHO formula was developed with less sodium and glucose to reduce side effects. ORS is the main treatment for mild to moderate diarrhea and helps rehydrate the body by enhancing intestinal absorption of water and electrolytes. It can also be used to maintain hydration for other conditions causing fluid loss.