Carbohydrates eaten will directly effect blood glucose levels but they do not need to be totally eliminated from the diet nor should they be. Eating the ones that pack the most nutritional value are the best choice. Choose whole grains, rather than those highly processed, or made with added fat and sugar, like donuts. Whole fruit is a better choice than for example, a glass of fruit juice simply because it will have a higher fiber content. Coupling fruit with a few nuts will help slow digestion, thereby stablizing blood sugar.
A personal evaluation with a Registered Dietitian will help you determine the amount of carbohydrates you are allotted daily to be your best self.