Why You’re Suddenly Craving Sugar: Hidden Reasons and What They Mean

Craving sugar can come from poor sleep, stress, low blood sugar, habit, or hormones.

Common causes

• Poor sleep: raises ghrelin.
• Stress and cortisol.
• Low blood sugar.
• Habit and boredom.
• Hormones, such as before periods.
• Skipping meals.

Reduce

• Eat protein and fiber.
• Sleep 7 or more hours.
• Drink water.
• Choose fruit.

Guidelines

The AHA recommends no more than 25 g added sugar a day for women and 36 g for men.

See a doctor

If cravings are intense or with thirst.

Physiology of sugar cravings

Sugar activates reward pathways in the brain, releasing dopamine. Cravings may reflect habit, stress, poor sleep, hormonal shifts (premenstrual or pregnancy), skipped meals leading to low blood sugar, or eating highly processed foods. Sleep restriction raises ghrelin and lowers leptin, which increases appetite for sweet foods.

• The WHO recommends keeping free sugars below 10 percent of total energy intake, ideally below 5 percent (about 25 g for adults).
• The American Heart Association advises no more than 36 g (9 teaspoons) of added sugar per day for men and 25 g (6 teaspoons) for women.
• Average Americans consume around 17 teaspoons of added sugar daily.

Reduce cravings

Eat protein and fiber at each meal, get 7 to 9 hours of sleep, and stay hydrated. Choose fruit or yogurt with berries instead of candy. Cutting back gradually works better than quitting abruptly. Persistent intense cravings with excessive thirst, frequent urination or weight loss should prompt a blood glucose test for diabetes.

Physiology of sugar cravings

Sugar activates reward pathways and triggers dopamine release in the brain. Cravings can be driven by habit, stress, poor sleep, hormonal changes such as before a period, and skipped meals leading to low blood sugar. Sleep restriction raises ghrelin and lowers leptin, which increases appetite for sweet, high calorie foods.

Reduce cravings

Eat protein and fiber at each meal, sleep 7 or more hours, and manage stress. The American Heart Association advises limiting added sugar to 25 g (6 teaspoons) a day for women and 36 g (9 teaspoons) for men. Persistent intense cravings with thirst and fatigue should prompt a diabetes check.

Hormones and habits

Sugar triggers dopamine release in the nucleus accumbens. Leptin and ghrelin shifts after poor sleep increase cravings, as shown in a 2013 study at Columbia University, where sleep-deprived people ate 300 more calories. Premenstrual cravings relate to falling estrogen and serotonin. Zinc or chromium deficiency is sometimes suggested but evidence is limited.

Strategies that work

Eat regular meals with 20 to 30 g protein at breakfast, include fiber, sleep seven hours, and substitute fruit or yogurt. The WHO suggests limiting free sugars to under 10 percent of calories, ideally 5 percent, about 25 g. Artificial sweeteners do not clearly reduce cravings. If cravings come with excessive thirst and urination, test for diabetes.

Based on data from the World Health Organization and the American Heart Association