Despite the lack of, or mixed reports for people with type 2 diabetes it would be safe to consider consuming diluted ACV, 1-2 tablespoon in a large glass of water before bedtime to provide some benefit to blood sugar levels.
There is no research that suggests cinnamon negatively affects blood sugar, meaning that is safe to use for people who are looking for alternative diabetes treatment options. Cinnamon can be taken as a supplement to conventional diabetes medication should start small, with about 1 g per day (about ¼ to ½ teaspoon).
It is important for people to note that ACV or cinnamon should not be considered a quick fix or complete treatment for diabetes. Eating a diet low in carbohydrates, high in fiber, regular exercise, multivitamins, essential fatty acids and complementary therapies to reduce stress and maximize body function will additionally help in diabetes control.