How are you measuring your potassium levels?
A friend of mine has terminal heart problems (he is on the transplant list) and his potassium levels are very high but to test the levels he has to have blood taken and sent to a lab.
His levels are so high they would be really dangerous for a "normal" person.
Too much potassium is really dangerous as it can stop the heart!
If someone at the lab checks his results and has not looked up his records they tend to send an ambulance to rush him to hospital!
I have never heard of anyone having low potassium levels normally..
Certainly all the blood tests I have had done have never high-lighted any problems with potassium or anything else to be honest.
My vitamin and minerals levels have always been spot on.
Someone suggested magnesium helps with Hyperglycemia before so I bought a bottle of magnesium mineral tablets to see if they were right...
Only took one cos it made me feel really "odd" unfortunately Odd was not happy about this so I had to stop taking them.. Sorry my sense of humor getting the better of me again.
Seriously I have tried several vitamin and mineral supplements over the years as recommended by all sorts of people and all have had side effects (except vitamin C and D3) Really I need none of them and the sudden excess from the tablets really messes with my system badly.
A down dip after a Dextrose / Glucose spike is normal which is one reason its not a good idea to use the stuff.
The dip will be even deeper if the reason the Dextrose was taken was to cover a fructose hypo.. and will be even deeper still if the Dextrose / Glucose is contaminated with Fructose.
If you are not careful you end up a Dextrose / Glucose junkie constantly looking for the high / rush you get shortly after taking it.
And hurting from the lows you get after it has Burnt off, and the fructose drop knocks you back down.. The human body has not adapted yet to pure sugars without fiber to moderate the speed of adsorption of them.. hence the massive plague of diabetes / obesity sweeping the world.
Give us ( the human race) a couple of million years to evolve some more and we will be fine with it but for now and in our lifetime's or even in our great great grand children's lifetimes .. it is not good stuff to take.
If you are needing some Dextrose.. (and I cannot think of a reason unless you are a double Zero HFI) then mix it into some none digestible fiber to slow down its adsorption into the body so you can avoid the spikes and lows.
Better still eat some white bread and butter, (home made if you live in the USA) or how about cheese on toast? Pasta or a rice pudding?
all much better for you and far healthier
Take care.