Sleep eating – nocturnal eating syndrome – is a sleep disorder, but it is different from a sleep-related eating disorder. Sleep-related eating disorders are linked with insomnia and nocturnal eating syndrome is associated with parasomnia.
In nocturnal eating syndrome (NES) the individual can eat once, twice or even more throughout the night while they are unconscious, and they are often not aware of what they are doing. In a sleep-related eating disorder (SRED) an individual consumes nearly one-quarter of their daily calories in the nighttime as a means to fall asleep. In SRED individuals tend to have insomnia and believe eating can help them sleep.
Sleep-related eating disorder (SRED), a parasomnia sleep disorder
A person with SRED will appear to wake up, go and eat, and return to bed. Similar to sleepwalking, it can be difficult to wake up a person with SRED. Even if the person is not hungry or thirsty they will experience at least once episode a night where they go and eat. Food during an episode is often consumed quickly and tends to be of high-sugar and fat content.
Sleep eating has potential to be quite dangerous. For example, if the person attempts to make a hot meal or cuts themselves while using a knife. Sometimes the individual will leave the kitchen in a messy state, which may help them recall what occurred when they wake up the next morning.
Other complications associated with SRED are related to indigestion; in the worst-case scenario a person consumes things that are not food, such as cigarettes. It’s important to keep things that may pose a threat to health if ingested out of the kitchen.
Nocturnal eating syndrome (NES), an eating disorder associated with insomnia
In NES individuals are fully conscious and aware they are eating at night. NES sufferers do not normally consume large amounts of food; their eating has been linked with their emotional state. Jillon Vander Wal, Ph.D., told Psychiatry Advisor, “According to the biobehavioral model of NES, an inherited trait or predisposition for NES, when combined with stress, reduces the amount of serotonin in the brain, thereby dysregulating circadian rhythms and decreasing satiety. This model suggests that we can intervene in several ways to reduce the symptoms of this disorder.”
Difference between SRED and NES – Quick reference table
| SRED | Nighttime eating | NES |
|---|---|---|
| -Amnesia of the event | -Partial recall of the event | -Full recall of the event |
| -Little arousal from sleep | -Half-awake, half-sleep | -Total arousal from sleep |
| -Eating episode after the onset of sleep | -Increased appetite at night after the onset of sleep | |
| -No daytime food cravings | -Food cravings in the evening | |
| -Intake of bizarre items | -Intake normal food items | |
| -Morning anorexia | -Morning anorexia | |
| -Comorbid sleep disorders common |
Sleep-related eating disorder and nocturnal eating syndrome causes
Nocturnal eating disorders are more common in women than men and more common in those younger than 50. Nocturnal eating disorders may stem from other underlying medical issues or certain medications may also promote late-night eating.
Signs of a nocturnal sleep disorder include:
- Waking up to eat, then going back to sleep
- Eating more food, even right after dinner
- Little to no appetite at breakfast
- Seeing evidence of nighttime eating the following day – mess in the kitchen
- Experiencing weight gain
Treatment of nocturnal eating syndrome and sleep-related eating disorder
The first step to treating SRED and NES is to see your doctor to rule out any other medical condition. A sleep test may be advised for further clarification.
Medication can be prescribed to control appetite and aid in weight loss.
If depression is the cause of SRED or NES, treating is can improve the conditions. Antidepressants may be prescribed as well.
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Sources:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2945843/
https://www.sleepassociation.org/patients-general-public/sleep-eating/
http://www.psychiatryadvisor.com/eating-disorders/night-eating-disorder-light-therapy/article/443686/2/
http://www.researchgate.net/figure/269637150_fig1_Figure-1-Spectrum-of-night-time-eating.15-NES-night-eating-syndrome-SRED
http://www.everydayhealth.com/sleep/other-disorders/nocturnal-eating-disorders.aspx
http://www.webmd.com/sleep-disorders/guide/sleep-related-eating-disorders