You know there is a generally accepted daily minimum for sodium. IIRC it's 3/4 t. table salt/day. Because we cook everything from scratch and eat mostly plant-based, it's a bit of a bother to get that much every day. We have to work at it a little. You might think about that, too. I use Endurolytes. They are low sodium for an electrolyte pill, but they work. Random variation is usually the best explanation, but one never really knows. More experimentation.