Those figures are very high, by the way, I'm sure your doctor/diabetic nurse isn't aiming for you to have a BG level that high, so you should definitely be talking to them. By the way, it's really helpful if you put the type of diabetes you have in your personal info, so that people can tailor their advice, as it's likely to be very different depending on your diagnosis. So far, people seem to have been assuming you're Type 2. If that's so, then the low carb / Mediterranean diet is definitely worth looking into. Personally, I'd recommend the book 'The Blood Sugar Diet' by Michael Moseley as a starting point.