Hypoglycemia after taking Vitamin C

[vintagesf]

Hello,
I have noticed that whenever I take vitamin C (tried different brands, 500 to 1000 mg) I feel really weird and my blood glucose meter goes over 200 and a few minutes later I get very severe hypo symptoms with blood glucose readings anywhere between 40-75.
I read that some meters might not function properly and give falsely high readings after vitamin C, but the reason I started testing again is because vitamin C made me feel weird.
I know I need vitamin C, but I am afraid to keep taking it if it's doing this to my blood glucose.
Anyone has any ideas what is going on here? Please help!
Thanks!

[esmee]

Do you take it on an empty stomach or with food?

[ukbill]

Try a slow release variety that might help.

I take a slow release version and have no problems.

I have similar problems if I take Iron containing vitamins.

Have you had problems with your gums? That is the first sign of lower than normal Vitamin C.