Night Eating Syndrome (NES) is more than just “midnight munching.” It is a real and complex disorder that combines temporal imbalance in food consumption, sleep disturbances, and emotional distress. It is distinct from overeating and bulimia, as the amounts of food may not be enormous, but the need to eat in order to regain sleep is compulsive.
NES is characterized by three main features:
Anorexic breakfast: Waking up without hunger and skipping breakfast.
Overeating at night: More than 25% of daily calorie intake occurs after dinner, often with episodes during nighttime awakenings.
Waking up to eat: The first prerequisite for falling back asleep is eating, creating a vicious cycle.
A) Hormonal Imbalance :
-Melatonin & Cortisol: In healthy individuals, melatonin (the sleep hormone) increases at night, while cortisol (the stress/alertness hormone) reaches its lowest point. In NES, this profile is reversed. Studies show lower melatonin levels and higher evening cortisol levels in people with NES, which explains the difficulty in falling asleep and staying awake at night.
-Leptin & Ghrelin: Leptin (the hunger “inhibitor”) usually peaks at night, suppressing appetite. Ghrelin (the hunger “activator”) increases before meals. In NES, there is evidence of a reversal or normalization of this rhythm, resulting in stronger hunger at night.
B) Circadian Rhythm Disorder:
NES is considered, among other things, a disorder of the circadian rhythms of feeding. The internal biological “clock” that regulates sleep-wake cycles, temperature, and food cravings is not synchronized with the normal 24-hour cycle. Thus, the peak of appetite shifts to late evening and nighttime.
C) Link to Metabolic Disorders:
NES is closely related to obesity, insulin resistance, and type 2 diabetes. The biochemical cycle is twofold: nighttime overeating promotes insulin resistance, and insulin resistance can exacerbate the hormonal abnormalities that lead to nighttime hunger.
Then there are the psychological and emotional causes of the problem. Here, a holistic approach is essential, as nighttime eating rarely has to do with physical hunger alone.
- Suppressed Emotions as a “Nighttime Guide”: The calm of the night can reveal emotions (anxiety, anger, loneliness, dissatisfaction) that are suppressed during the day by activities. Food becomes a self-soothing mechanism, an attempt to “fill” an emotional void.
- Stress and Escape: Nighttime may be the first time a person feels “out of control” over their time. Eating becomes a form of escape from the stress of the day or a reward.
- Disruption and Lack of Routine: Individuals with NES often report low self-esteem and feelings of shame around their episodes. This creates a cycle of anxiety -> nighttime eating -> shame -> more anxiety.
Night Eating Syndrome (NES), viewed through the lens of the four temperamental levels, is not simply a “bad eating habit,” but a neuro-metabolic dysregulation with psychosomatic roots. At the genetic level, individuals with a tendency toward phlegmatic or melancholic qualities often exhibit reduced morning activation, low cortisol awakening, and a shift in appetite toward the evening hours. On an emotional level, NES acts as a self-regulatory mechanism: food becomes a soothing remedy for anxiety, loneliness, or internal tension that was not expressed during the day. On a mental (cognitive) level, there is hyperarousal, ruminative thinking, and difficulty “shutting down” the mind, resulting in the body craving food to slow down and allow sleep. Finally, on a phenotypic level, the picture is completed by circadian rhythm disorders, unstable blood sugar levels, and nighttime awakenings, where hunger is not a real need but a sign of dysregulation. Thus, the holistic treatment of NES is not only aimed at “not eating at night,” but at restoring rhythm, security, and energy balance at all levels of temperament—as has always been the case in traditional medicine: first regulate the person, then the behavior. Choleric type (hot–dry).In the choleric type, the NES is mainly associated with hyperarousal and internal control pressure. During the day, it operates “in the red,” bypassing signals of hunger and fatigue, and at night, the nervous system refuses to slow down. Nighttime food consumption is not so much about hunger as it is about the need to unwind and relieve tension. If the action-rest rhythm is not restored, the body will find nighttime to be the only time to relax.
Blood type (hot-wet)
In the sanguine type, NES often manifests itself through emotional overexcitement and social exhaustion. The day is full of stimuli, contacts, and changes, resulting in a feeling of emptiness in the evening. Food acts as an emotional continuation of the day rather than a biological necessity. If there is no clear “closure” and emotional release before bedtime, eating becomes the transitional mechanism to nighttime.
Melancholic type (cold–dry)
In the melancholic type, NES is strongly related to internalized anxiety, ruminative thinking, and feelings of inadequacy. The mind is activated at night, when the external environment is silent, and food is used to calm mental hyperactivity. This is often accompanied by strict control during the day and “breaking” of boundaries at night. If a sense of security and stability is not supported, NES functions as a form of nighttime self-medication.
Phlegmatic type (cold–wet)
In the phlegmatic type, NES is more associated with circadian rhythm disruption and unstable blood sugar levels. There is often reduced morning appetite, slow metabolic rate, and a shift in energy demand toward the evening. Nighttime food consumption is not impulsive, but the result of accumulated unmet biological needs. Without rhythm restoration, the body “wakes up” when it should be resting.
Treatment should target biochemistry, behavior, and emotions simultaneously.
Some treatment tips are:
-Emotions & Food Diary: Record not only “what” and “when” we eat, but also “how I felt before and after.” This helps identify emotional biases.
The Pre-Sleep Relaxation Protocol:
-Breathing Techniques (4-7-8): Inhale for 4, hold for 7, exhale for 8 seconds. Calms the nervous system.
-Gentle Evening Yoga or Stretching: Helps release physical tension.
-Mindful Eating even at night: If an episode occurs, the key is to break the autopilot. Stop, ask “Am I really hungry?”, serve the food on a plate (not from the packaging) and eat mindfully, without giving in to self-judgment.
— Dr. Angeliki Makri, Clinical Dietitian, MSc, PhD, Medical School of the National and Kapodistrian University of Athens
Make an appointment at NMD Praxis to understand what you need in terms of nutrition and to learn what your body specifically needs!
Bibliography & Sources:
- Allison, K. C., et al. (2005). “The Night Eating Questionnaire (NEQ): Psychometric properties of a measure of severity of the night eating syndrome.” Eating Behaviors.
- Goel, N., et al. (2009). “Circadian rhythm profiles in women with night eating syndrome.” Journal of Biological Rhythms.
- Vinai, P., et al. (2015). “Clinical validity of the descriptor.” Journal of the Academy of Nutrition and Dietetics.
- Rogers, N. L., et al. (2006). “Neuroendocrine and psychometric evaluation of a placebo version of the ‘night eating syndrome’.”
- Baron, K. G., et al. (2011). “Role of sleep timing in caloric intake and BMI.” Obesity.
- 6. Stunkard, A. J., et al. (1955). “The night-eating syndrome; a pattern of food intake among certain obese patients.” American Journal of Medicine.
- 7. Βιβλίο: “Overcoming Night Eating Syndrome” (2004) από τους K. C. Allison, A. J. Stunkard & S. H. Thorne.
