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Why is ghrelin known as the “hunger hormone”?

Ghrelin stimulates the release of growth hormone from the pituitary gland, which in turn increases appetite and food intake. It acts on the hypothalamus, a region of the brain responsible for regulating hunger and satiety signals.

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When the stomach is empty, ghrelin levels rise, signaling the brain that it’s time to eat. This increase in ghrelin production triggers hunger sensations, leading to the desire to consume food. As food is consumed and the stomach stretches, ghrelin levels decrease, signaling the brain that the body is becoming satiated.

The “hunger hormone” designation for ghrelin is also attributed to its ability to influence food preferences. Studies have shown that ghrelin can enhance the reward value of high-calorie foods, leading to cravings for unhealthy and calorie-dense options.

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Moreover, ghrelin levels fluctuate throughout the day, with the highest levels typically observed before meals and the lowest levels after meals. This diurnal rhythm of ghrelin secretion further emphasizes its role in regulating hunger and satiety.

Understanding the mechanisms behind ghrelin’s effects on hunger and appetite regulation is crucial for developing strategies to manage weight and promote healthy eating habits.

Keywords: ghrelin, hunger, hormone, levels, stomach, regulating, appetite, crucial, sensations