i would say whichever you feel you can do most successfully. smoking is a huge health risk factor and can affect blood sugar levels. if you choose to do that first which makes a lot of sense you can still make small changes to your diet while taking medication. for example eating at the right times to coincide with medication and checking blood sugar can be a good first step while you kick the smoking habit. once your smoking habit is under control you can dive deeper into diet and exercise. but the key is starting somewhere and taking it one small step at a time. good luck! see more. smoking cessation health center a healthy type 2 diabetes diet
what is more important for a newly diagnosed diabetics? change diet or stop smoking?