Many people notice that during winter, they feel hungry more often, portions become larger, and weight gain accelerates. This change is not only related to reduced physical activity. The main reason lies in seasonal hormonal changes, decreased daylight, and the body’s natural defense mechanisms.
To answer the question what is a hormone, hormones are biological messengers that regulate processes in the body. During winter, the hormonal system tries to adapt to environmental conditions, which may increase the risk of hormonal imbalance.
This imbalance can present itself through symptoms of hormonal imbalance, such as:
increased appetite
cravings for sweets and carbohydrates
fatigue and low motivation
To explain what is melatonin, melatonin is a hormone released in darkness that regulates the sleep–wake cycle. During winter, reduced daylight causes the melatonin hormone to be released earlier and for longer periods.
Among the main benefits of melatonin is improved sleep quality. However, prolonged elevation of melatonin levels may:
increase appetite
raise energy demand
lead to higher food intake
To answer what is serotonin, serotonin is a hormone associated with mood and satiety. In winter, reduced sunlight leads to lower serotonin hormone levels.
As a result, the body:
craves more carbohydrates
seeks comfort through sweets
experiences emotional hunger
Cortisol is known as the stress hormone. During winter:
cold weather
reduced movement
psychological stress
may increase cortisol levels. When cortisol rises, the body shifts into energy-conservation mode, which accelerates weight gain.
Metabolism refers to the body’s energy production and usage system. In winter:
metabolic rate decreases
energy expenditure drops
hunger signals appear more quickly
In this state, appetite-stimulating factors feel stronger, while appetite-suppressing mechanisms become less effective.
Not every increase in appetite during winter is a problem. However, attention is needed if:
weight gain is rapid
fatigue persists
hormonal imbalance is suspected
In such cases, evaluating hormonal balance becomes essential.
Yes. It is a natural response of the body to cold temperatures and reduced daylight.
Yes. Elevated melatonin levels may increase appetite.
Yes. Reduced serotonin often increases emotional eating and sugar cravings.
No, but it slows down, reducing overall energy expenditure.
Increased appetite during winter is not simply a matter of willpower. It is a quiet adaptation process involving melatonin, serotonin, cortisol, and metabolism. The body attempts to protect itself by conserving energy and increasing intake. Understanding this mechanism is the most important step toward preventing weight gain during the winter months.
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