What is the primary effect of the hormone ghrelin?

The hormone ghrelin is primarily known for its role in stimulating appetite. It is often referred to as the "hunger hormone" because it is secreted by the stomach when it is empty and signals the brain to initiate feelings of hunger. This action encourages food intake, making ghrelin a significant player in the regulation of energy balance and appetite control.

When ghrelin levels rise, they promote a sense of hunger, leading individuals to seek out food. This hormone acts on specific receptors in the hypothalamus, an area of the brain that regulates food intake and body weight. Consequently, higher levels of ghrelin correspond to increased appetite and food consumption.

While other hormones may have various roles in glucose production and metabolism, ghrelin's primary function is our innate predisposition to eat, making it crucial for understanding hunger and energy homeostasis.