The bleeding that occurs while you take the inactive pills isn't the same as a regular period. Nor is the bleeding necessary for health. This is good news if you take birth control pills and want more control over your menstrual cycle, either for personal or medical reasons.
To prepare for the glucose tolerance diagnostic test: 1  Eat a balanced diet that contains at least 150 grams (g) of carbohydrate per day for 3 days before the test. Fruits, breads, cereals, grains, rice, crackers, and starchy vegetables such as potatoes, beans, and corn are good sources of carbohydrate.
â eggs, oatmeal (or whole grain cereal, or a piece of wheat toast with peanut butter), and fresh fruit or juice. Also, beware of coffee or other caffeinated drinks before the test as they tend to have the same detrimental effects as sugar, with unpredictable boosts of energy/jitters followed by crashes and fatigue.