Thats just what my doctor told me. I didn't have my test till 2 in the afternoon though so that may have been why
Mine told me not to chew gum either and I wouldn't eat toast. Toast is bread which is carbs which turns to.sugar I'm.sure you know. To be safe I wouldn't do anything but drink.water!
Just a pointer, the lab tech told me at mine that even chewing gum can set the levels off. So try not to chew gum the day of. She also told me that eating cookies or ice cream two days prior can affect it.
Stay away from sweet juices, also. Including apple juice. Eggs is something good to eat..
I didn't fail the 1st one but my docs told me to eat nothing sugary the day before and only eat toast the day of.
Watch your carbs... No soda. But sometimes there's nothing you can do about it. I have it. I used to check 4 times a day but levels are good enough to only check once a day. It's not as bad as people think, it makes you healthier, in my opinion! Good luck.