• Guest - w'd love to know what you think about the forum! Take the 2025 Survey »

Coffee

K

Kiggy

Active Member
Messages
29
I did a blood glucose test before going to bed after munching on red skin peanuts and my reading was 6.1. On just having a cup of black coffee on waking I tested again and was 6.5. I was told black tea or coffee would not affect the reading. Why would my result be higher? Is this result diabetic range or pre diabetic? Thank you
 
Hi @Kiggy anything can move your Bg result, it could be just the Dawn Phenomenon. I some times go up by 1 point from my night time reading to morning reading and all I have done is slept.
 
You could easily do two ingerstick tests, one immediately after another, and find that one was 6.1, the other 6.5. Most test strips allow for up to +/- 20% accuracy, I believe. Some are as good as +/- 10%, but even so, a difference of 0.4 is negligible, in my view. If you consistently rise at that time of day, though, dawn phenomenon could well be to blame.
 
Even using a different place on your finger can give a different result also remember your body stores glucose and releses into thr blood stream it when it chooses --- just be happy with a low 6
 
Also, for many people their bg will rise upon getting up (feet on the floor effect), you could try testing right after waking up and before getting out of bed and then again with your coffee.
At least that way you'd know if it rises during sleep or upon getting up.

Also, a rise of .4 is basically the same number.
 

Hi Kiggy,

I think I am going to echo a lot of what has been written before. Test strips are not 100% accurate so I wouldn't consider .4 a significant rise. You actually remained pretty stable over night which I believe is good!

Tom
 
You must log in or register to reply here.
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn More.…