According to Wikipedia the new formula contains salt, trisodium citrate, potassium chloride and anhydrous glucose. A similar rehydration solution can be prepared using 6 level teaspoons (25.2 grams) of dextrose (glucose) and 0.5 teaspoon (2.1 grams) of salt in 1 liter (4 1/4 cups) of water.
In a small study Marvin Medow Phd found the WHO's ORS solution more effective than IV saline at relieving orthostatic intolerance in young people with postural orthostatic tachycardia syndrome (POTS) - most of whom met the criteria for ME/CFS.
Among others, the ORS normalized blood flows to the brain - a major issue in chronic fatigue syndrome (ME/CFS) and POTS.
See - Low Brain Blood Flows and Orthostatic Intolerance Ubiquitous in Chronic Fatigue Syndrome (ME/CFS)
Medow recommended preparations by Jianus Brothers or Normalyte. TriOral packets available on Amazon.com also contain the WHO formula.
Medow warned that using table sugar (sucrose) instead of dextrose does not work. Most ORS recipes on the internet use table sugar.
For more see - Oral Rehydration Solution More Effective than Saline IV at Improving Orthostatic Intolerance
