Oral Rehydration Solution (ORS) Composition Table
Nutrition & Sports Nutrition Reference Tables
Oral Rehydration Solution (ORS) Composition Table
WHO reduced-osmolarity ORS composition per litre of correctly prepared solution; use the specified packet volume rather than improvising concentrations.
| Component | Concentration | Basis |
|---|---|---|
| Sodium | 75 mmol/L | WHO reduced-osmolarity formula |
| Glucose | 75 mmol/L | Supports sodium–glucose cotransport |
| Potassium | 20 mmol/L | Electrolyte component |
| Chloride | 65 mmol/L | Electrolyte component |
| Citrate | 10 mmol/L | Base component |
| Total osmolarity | 245 mOsm/L | Not the same as a standard sports drink |
Oral Rehydration Solution (ORS) is a defined water-electrolyte replacement formulation, especially for gastrointestinal losses, not interchangeable with every sports drink.
Oral rehydration solution uses a defined glucose-electrolyte formulation for losses such as diarrhea and is not interchangeable with any sports drink. Coupled sodium-glucose transport supports water absorption. Prepare powder with exactly the labeled water volume; concentrating it to make it stronger disrupts the formulation. Illness with inability to drink or impaired consciousness requires clinical assessment rather than continued experimentation with homemade mixtures.
Much water absorption occurs in the intestine, following solute transport and osmotic gradients. Sodium and glucose can contribute, but plain water is also absorbed; every sip does not require added sugar. Intestinal uptake, distribution among body compartments and renal retention are connected yet distinct processes. A claim about one stage should not automatically be interpreted as proof of a better whole-body hydration outcome.
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