The standard formula of oral rehydration salt (ORS) recommended by the World Health Organization (WHO) is： ###**Standard formula (per liter of water)** -**Table salt (sodium chloride)**: 2.6g (about half a teaspoon, need to be accurately measured) -**White sugar (or glucose)**: 13.5g (about 3 teaspoons) -**Potassium chloride**: 1.5g (optional, if not omitted) -**Sodium bicarbonate (baking soda)**: 2.5g (optional, if not replaced with sodium citrate 2.9g) --- ###**Simple alternative for families** If there are no professional ingredients, the following formula can be used as an emergency (the effect is inferior to the standard ORS)： -**Water**: 1 liter (cool after boiling) -**Table salt**: 2.6 grams (half a teaspoon, be sure to be precise) -**White sugar**: 20 grams (5 teaspoons, double sucrose to promote absorption) -**Optional**: Orange juice (potassium supplement) or lemon juice (sodium citrate supplement) --- ###**Precautions** 1. **Strict proportions**: Excessive salt may aggravate dehydration, and too much sugar can easily cause diarrhea. 2. **Drinking method**: A small amount of multiple times, children's weight is about 10-20 ml/kg per hour. 3. **Applicable scenarios**: It is only used for mild to moderate dehydration (such as diarrhea and vomiting), and medical attention is required in severe cases. 4. **Safe water quality**: Be sure to use clean (boiled) water. --- ###**Safety tips** -If you have symptoms such as persistent vomiting, no urine, and blurred consciousness, please seek medical attention immediately. -It is recommended to consult a doctor before using it for infants, the elderly, or patients with chronic diseases. Proper rehydration can prevent dehydration from worsening, but you need to ensure that the composition ratio is accurate!