Why Your Screen might be Making You Hungry

We’ve all been there. You’re lying in bed, scrolling through your social media feeds or catching up on emails, when suddenly you’re hit with a craving for a snack. It’s midnight, and you shouldn’t be hungry, but your body is telling you otherwise. You reach for the chips or the ice cream, and before you know it, you’ve consumed a few hundred extra calories.

It turns out that the blue light emitting from your devices isn’t just messing with your sleep—it might be messing with your appetite, too.

The light that comes from screens—smartphones, tablets, laptops, and televisions—is rich in blue light. This type of light has a shorter wavelength and higher energy than other colors of light. Our bodies use blue light to regulate our circadian rhythm, the internal clock that tells us when to wake up and when to go to sleep.

In the morning, blue light from the sun helps us feel alert and energized. However, exposure to blue light in the evening can suppress the production of melatonin, a hormone that promotes sleep. This can lead to insomnia and other sleep problems.

But recent research suggests that blue light might do more than just disrupt our sleep. It might also increase our hunger. One study found that exposure to blue light in the evening led to increased hunger and a stronger desire for sugary foods. The researchers believe that blue light might affect the production of ghrelin, a hormone that stimulates appetite, and leptin, a hormone that signals fullness.

Another study found that blue light exposure can alter glucose metabolism, which can lead to weight gain. When our bodies aren’t able to properly process glucose, it can cause us to crave more sugar and carbohydrates.

If you’re concerned about the effects of blue light on your sleep and appetite, there are a few things you can do to manage your exposure.

First, try to limit your screen time in the evening. If you must use your devices, wear blue light blocking glasses or use a blue light filter on your screen. Many devices have a "night mode" that reduces blue light emission.

Second, make sure your bedroom is dark and quiet. This will help you get a better night's sleep, which can also help regulate your appetite.

Finally, try to get enough sleep each night. Adults should aim for 7-8 hours of sleep. If you’re not getting enough sleep, your body might produce more ghrelin and less leptin, leading to increased hunger.

Blue light from screens is more than just an annoyance. It can have serious consequences for our health, including disrupted sleep and increased hunger. By managing our blue light exposure and getting enough sleep, we can protect our health and well-being.  Let me know what you think, I'd love to hear.  Have a great day.