Hi Recent research has led to renewed interest in low potassium as a possible risk factor for diabetes that is both common and potentially modifiable. Indeed potassium is good for health and it has nothing to do with your lower sugar levels Probable reasons for lower glucose could be - you must have taken higher dose of insulin - you must have skipped the meals or taken lesser quantity of food - frequency of insulin - taken more times - could have taken excess alcohol(please excuse if you are non alcoholic) there may me many more suggest you check your insulin levels daily or as advised by your treating doctor Wish you good health Regards Dr Sridhar K