Glucose test question?

Chelsie

So I am just supposed to go into the lab whenever before my next appointment to do the glucose test but was wondering if peanut butter and marmalade toast would be too fatty to eat before hand. I was planning on yogurt and eggs this morning but cravings got to me lol. Anyways I wanted to get the test done and out of the way but was wondering if I should wait for another day.