Many people experience a puzzling phenomenon: going to bed very hungry but waking up the next morning with little or no appetite. A recent Quora post asked why this happens, prompting experts to explain the science behind it.

Dr Mohnish Kataria, Senior Consultant in Gastroenterology at Paras Health Panchkula, says this is a common occurrence. “During sleep, the body adjusts energy use and hormone levels. Appetite-regulating hormones like ghrelin (hunger hormone) and leptin (satiety hormone) fluctuate overnight, which in some people can suppress morning hunger,” he told media.

Additionally, the body’s energy requirements drop significantly during sleep. Since the body isn’t actively burning calories, there’s no urgent need to eat immediately upon waking, leading to a temporary lack of hunger. For many, appetite builds gradually as the day goes on, so skipping breakfast occasionally is not a concern.

Several factors influence this phenomenon:

Sleep patterns: Poor or irregular sleep can disrupt hunger hormones and reduce appetite.
Metabolism: A lower metabolic rate at night and early morning weakens hunger signals.
Eating habits: Going to bed hungry or late meals can temporarily alter energy needs.
Circadian rhythm: The body’s internal clock may delay hunger until later in the day.
Experts note that morning hunger is not necessarily strong for everyone and usually increases as the day progresses.

When to seek medical advice
If lack of morning hunger becomes persistent and is accompanied by other symptoms, it may indicate an underlying issue. Dr Kataria recommends consulting a doctor if you notice:

Continued loss of appetite throughout the day
Continued loss of appetite throughout the day
Unexplained weight loss
Fatigue or weakness
Nausea, bloating, or digestive discomfort

These signs could point to gastrointestinal or metabolic conditions that require professional attention.

#From Indian Express