Andrew Huberman· PhD
There are the so-called POMC neurons, okay? Pro-opiomelanocortin neurons that tend to act as more of a break on appetite, by way of another hormone called melanocytes stimulating hormone. And not so incidentally when you're getting a lot of sunlight and you're viewing a lot of sunlight, that system is ramped up. This is why appetite is lower in the summer months than it is in the winter months. This is true in animals. And this is true in humans.