It’s an unspoken rule to not eat late at night for reasons ranging from the food keeping you up later in the evening to experiencing a stomachache.

The body is on a 24-hour clock known as the circadian rhythm — which serves many functions, including alertness, sleepiness, appetite and body temperature.

The main issue with late night eating is caused by food choices.

“When individuals consume food during the nighttime, it tends to consist more often of processed foods high in carbohydrates and fats rather than carefully planned and balanced meals,” Janese S. Laster, MD, a physician board certified in internal medicine, obesity medicine, gastroenterology and nutrition, told Health.

Here are a few ways late night eating can affect the body:

  • Lowers energy levels
  • Disrupts sleep levels
  • Increases hunger and decreases leptin
  • Increases chances of obesity and diabetes
  • Digestive issues
  • Increase heartburn and acid reflux

“For individuals experiencing bloating or heartburn, it’s advisable to avoid eating within 90 minutes of bedtime to prevent the onset of gastrointestinal symptoms,” said Laster.

Choosing healthier food options could lessen the effects late night eating has on the body — especially if you work the night shift or are a student.

“During the shift, eat high-quality foods such as vegetables, salads, vegetable soups, fruits, wholegrain sandwiches, yogurt, cheese, eggs, nuts and green tea,” according to the CDC. “Eat more frequently when you need to boost your energy.”

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