It may make you hungry.
This has nothing to do with the recipes you've been collecting on Pinterest: When people were exposed to light with enriched blue wavelengths -- like those in tablets, laptops and smartphones, but stronger -- at dinnertime, they reported feeling hungrier than those who ate a same-calorie meal under ordinary dim light, Huffington Post reports. This increase in appetite started about 15 minutes after the light was turned on and lasted for more than two hours. Blood tests showed that the the blue light subjects had higher insulin levels as well as higher glucose levels. This may mean that the light makes the body less efficient at metabolizing the evening meal, speculated Ivy N. Cheung, a doctoral candidate in Northwestern University’s Interdepartmental Neuroscience Program, who led the research. (Yet another reason to not dine by computer light.)