Nicotine is responsible for consistent high blood sugar levels in diabetics ,,,, these consistent levels put you at higher risk for kidney damage , nerve damage, heart attack and stroke.
I quit smoking after smoking a pack a day for 30 years ,,,, first quit by switching to e-cigs ,,, do not buy the e-cigs that contain nicotine, in any amount. Buy the ones with zero nicotine ,,,you will find your next A1C reading is lower, your cholesterol and triglycerides are lower and blood pressure improved. It makes a huge difference in controlling your blood sugars and will help improve all your other readings which contribute to the metabolic syndrome.