Well iwent for a checkup with my diabetic nurse as i was having trouble since the increase with metformin and eggs..i asked if she could test me as i thought that either the increase in metformin or eggs was upseting me and making me feel ill and also had tummy problems after taking both at breakfast after four hours......she said why should i test you what use is that as everything yo eat will be high and you have onl had diabetes for 15 months and you are in the early stages...its only when you get worse you need to test...I said surely its better to know what effects me and to avoid it now before i get worse...she said i didnt know what i was talking about.......i came out of there feeling really stupid and embarressed........I just thought that if i could test what made it really high i would avoid or cut the size down would help me....I shall never ask again....