Exposure to blue lights are not only a cause of depression and insomnia, but they would be one of the hidden causes of your slow metabolism and especially your craving for sweets.

This thing that may initially seem paradoxical or unlikely, is actually the latest research field on which many scientists have focused their studies in the last decade. Except that in Italy there is still no talk of it.

But first, the answer to your question. What caspiterine is blue light ?

WHAT IS EXPOSURE TO BLUE LIGHT

By blue light we mean the light normally emitted by screens such as that of tablets, TVs, PCs, mobile phones, and some types of “cold” artificial lighting: in general, we speak of LEDs.
The effects of this exposure are harmful not only for our eyes: those who suffer it tend to go to sleep later at night, especially if they expose themselves from late afternoon to evening.

Blue light reduces the production of melatonin, disturbs sleep by making it shorter or lighter, so we wake up more frequently, and disturbs our natural circadian rhythm.

The impact of cold or neon displays and lighting on sleep and hormonal health has, as I said in the premise, been of scientific interest in recent years.

In 2016, a study came out that established that in addition to ruining the circadian and therefore hormonal rhythms, the light of TV, smartphone, tablet and even home / commercial lighting (it appears white to the eye, but the rays fall within the blue spectrum, that is from 400 to 490 nm) also creates damage in the retina of the eye, used for photoreception. The retina would then produce less melanopsin , a light-sensitive protein that affects the central nervous system by regulating the circadian rhythm. On the one hand this damage would reduce the natural concentration of melatonin, on the other hand it would cause an increase in the response of the adrenals, which would produce more stress hormones.
Those same hormones that should be low in the evening.

It should be clarified that the effect is cumulative : the first times, for example, will happen to go to sleep 10 minutes later and wake up a little earlier.
Which would not generate alarmism in anyone, as it is written here. 

But if you are people who work up to five in offices lit with these lights and then use an I-Pad in bed or stay on your cell phone until you fall asleep or work for hours on the PC, in the long run the effects are there. Some new PCs already have a filter for these lights, but not all.

TRY THE ANTI BLUE LIGHT EXPERIMENT

You can test yourself using an anti-blue light screen, which is installed with a mobile app like Twilight for Android, or a program like F.Lux for PCs and tablets.
At the same time change the led lights to incandescent lights (the Edisons).
You will find that you can already yawn at ten in the evening and that you feel much more relaxed.

WOULD BLUE LIGHT MAKE YOU FAT?

This is what a Dutch study, conducted by Dr. Anayanci Masís-Vargas and her team, says.
Please note: the study was conducted on mice (males) that have the same circadian rhythms as humans, i.e. they are diurnal and not nocturnal mice.

So let’s take the results with a grain of salt, but don’t totally underestimate them.

The study showed that an extra hour of blue light exposure impacts the glucose tolerance of the mice by reducing insulin sensitivity. During the day, that is, exposed mice tend to eat more sweets than unexposed ones. In essence, the researchers explain that in the long run, exposure to blue light would risk making us fat.