(CNN)Successfully tackling your morning to-do list could start with the first thing you put in your mouth.
If you're feeling like a zombie in the morning, an unbalanced breakfast consisting primarily of simple sugars could be to blame, said Nancy Z. Farrell Allen, a registered dietitian nutritionist and spokesperson for the Academy of Nutrition and Dietetics.
"Carbohydrates -- whether from fruits and vegetables or from sweets and cookies -- breakdown to sugar in the body, otherwise known as glucose," said McKel Kooienga, a registered dietitian, the founder of the blog Nutrition Stripped and the creator of the Mindful Nutrition Method, via email. "Think of glucose (or sugar) as energy in the body."
After we eat carbs, the pancreas produces the insulin hormone to clear the sugar from the bloodstream, Kooienga explained. The type, timing and amount of carbs eaten determines how much sugar is introduced to the bloodstream at one time. Simpler or processed carbs -- such as muffins