It is hard to beat IV delivery when it comes to putting medicine in the bloodstream quickly. However, intravenous delivery is not always necessary when it comes to hydration and vitamin supplementation, and for the vast majority of us these same nutrients are absorbed through the gastrointestinal tract rather easily. And as mentioned before, the Banana Bag Oral Solution meets the new recommendations by the World Health Organization for oral rehydration therapy, recommendations that showed a reduced need for supplemental IV therapy. There are also some studies that show ORAL rehydration having the advantage over IV rehydration when it came to physiological strain, heat tolerance, RPE (rating of perceived exertion), or thermal sensations during exercise in the heat. The answer to this very important question is this… There really is not much of a difference between the two in efficiency, but only when the ORAL solution is made correctly.