Diabetic Retinopathy Treatment Care

I’m going for a diabetes test and am concerned that certain foods and drinks could show a false positive.

I am writing a research paper and I am having a hard time with some of my searches ( I think my wording is wrong) I am actually writing about 5 hour energy but just general info will work. Can anyone maybe tell me how to find info on the effects that energy drinks and caffeine have on someone with diabetes? Even your personal testimonies will work. Thank you