Thanks Freddd. If I experiment with B2 again, it will be verrrrry slowly. At this point I really need to figure out my blood test results from today - potassium is at 3.9 (aiming for the 4.5 range). However, Anion Gap is at 19.9 (ref. 7-16) and CO2 is a little low at 19 (ref. 21-30). Both seem to indicate metabolic acidosis? Bad^2. And my sodium has shifted down 4 points to 138 (ref. 135-145). My system is feeling volatile. I wonder if a magnesium problem could be underpinning things? Low potassium can be linked to low mag., and low mag. can cause acidosis. I am taking 600 mg. of citrate a day, but maybe it's being washed out faster than I'm replacing?