Coffee
Technically, coffee does not raise your risk of diabetes. But if you already are a diabetic, it can destabilize your blood sugar. A study done in 2008 shows that your blood sugar increases by 8% for every 250 mg of caffeine.
Source: Healthy Gem
Coffee drinks that come with syrups, cream, and milk are worst for diabetics. Even a small-sized drink gas more than 10 teaspoons of sugar. If you are diabetic and you need your coffee, the best option for you is to drink black coffee or switch to decaf.