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Mistakenly adding too much of the sugar component of an oral rehydration solution made at home can actually worsen the diarrhea. The sugar in the intestinal contents can cause an osmotic diarrhea by drawing water into the lumen of the bowel. Likewise, excess rehydration salts in a homemade oral rehydration solution can result in electrolyte abnormalities such as hypernatremia (high serum sodium levels) if the child or adult is not taking in adequate free water.

The following recipe for homemade oral rehydration solution is one of the most complete versions of ORS that can be concocted at home in order to maintain the fluid status of individuals with diarrhea. Simpler recipes are available but they often lack key components. For example, mixing water, sugar and table salt (NaCl) in the correct proportions will make an ORS but this solution lacks the crucial electrolyte potassium (K+).

Recipe for home made oral rehydration solution:

Gather the following items: table salt (sea salt is even better), baking soda, sugar, orange juice (100% juice), water (filtered is preferred), large container that can measure 1 liter of fluid.

Measure one half teaspoon (1/2 tsp) of salt into the container. Add one teaspoon (1 tsp) of baking soda (NOT baking powder!). Add eight teaspoons (8 tsp) of sugar. Measure in eight ounces (8 oz) of orange juice. Add water up to the one liter (1 L) mark to dilute the above ingredients. Stir or swirl to combine.