How does light affect appetite?
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Exposure to light significantly affects appetite. According to , melanocyte stimulating hormone (Msh) is released from the medial pituitary when ultraviolet (UV) light hits the eyes. This hormone helps suppress appetite, explaining why people generally eat less in the spring and summer when there's more sunlight. Conversely, appetite tends to be higher in the winter due to reduced light exposure 1.
For effective regulation of eating behavior, suggests consistent exposure to light throughout the day. This synchronization helps maintain healthy appetite levels. He also highlights that getting morning sunlight can synchronize circadian rhythms, further aiding in appetite control and overall health 1.
Additionally, experiments have shown that light viewing directly impacts feeding behavior, reinforcing the idea that light and meal timing interact to support a coherent circadian system. Regular meal times and light exposure help inform the body's internal clock, optimizing hunger signals 2.
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