I have clues but I’m still trying to tease out all the details. It seems to have something to do with our RAAS System (renin angiotensin aldosterone) being dysregulated although many people are dysregulated in the opposite direction. 90/60 is about the average for Yanomami Indian women (with extremely low sodium intakes) and when they were studied their RAAS adaptations were the opposite of what we see in modern living conditions. People will argue that this is a stressful adaptation to their primitive lifestyle but perhaps it is how our bodies are actually designed to work? It’s highly controversial of course.Reduction of salt helped your low blood pressure? I have struggled with my blood pressure for my entire life its never been above 95/55 and many time was lower. Do you have any idea how that works?
What was stressful for me was having a bp of 75-80/55 and not being able to function. I now run around 95/65 so still on the low end of normal but I feel good and have no symptoms.
Are you symptomatic? We need adequate BP to sustain life and neither too high or too low is desirable but too low can actually be more acutely dangerous. My personal experience through all of this was that the more salt I consumed the more imbalanced I became as my body tried to get rid of it.