Every person is hit differently with this disease. When it really hit me at the age of 49, it took almost a year to figure out my major symptoms were potassium deficiency, although my blood tests were normal. I was having SEVERE fatigue, muscle cramps, & loss of strength. I started flooding my body with potassium (POM Wonderful Juice, baked potatoes, spinach & prescription potassium 1500mg). Combined I was taking around 7000mg of Potassium a day. Before I started the potassium, I would spend 4-5 days a week in bed. Now I can get out of bed almost daily. I'm still drained of energy (flu-like), but at least I'm out of bed.