For a few weeks I've been drinking salted water. I add one teaspoon of sea salt per 2 liters of water. I am not adding sugar even though this standard for hydration. My reason is I have low saliva output, my teeth are at risk, and I cannot get up to brush my teeth every time I drink water. The salt seems to be helping me. I took notice of this on one day when I was feeling much worse., and then realized I was not drinking from the tap, instead of from the pitcher of salted water. And on another day, I felt awful in the morning, and then realized I was not drinking from the pitcher. I still have bad OI. But not as bad as it was before. Also, my general feeling of health is somewhat improved. This makes sense if I consider that the inadequate blood circulation is affecting all of my body, not just my brain. A started all of this after my cardiologist told me to increase salt.