I've been lurking here for a while and am impressed with the kindness and knowledge of the people here. I've been trying to figure out some moderate neuro symptoms I've been having. My doctor's been mostly unhelpful, except to run blood tests over and over again... the only thing notable was that my blood potassium and magnesium were slightly below normal range. 6 months of potassium and mag supplements and the numbers have come up but the symptoms haven't changed much. I don't want to write a long discourse of all my symptoms, but I have three sort of unrelated questions maybe someone could give input on...

Could low potassium levels over many years (like 8 or 9...) cause permanent nervous system damage?

Would the muscle weakness or atrophy found in ALS or similar conditions be resistant to exercise? Would a person continue to grow weaker even if they're working out? I'm taking some comfort in the fact that despite occasional perceptions of weakness, I've been doing push-ups and other exercises the past few months and am regularly increasing the number I can do.

Could Sjogrens exist despite normal salivary output? It's been suggested I might have Sjogrens...

Thanks so much!
Dave