health on way xposure to blue light for 6.5 hours suppressed the release of melatonin for twice the same time as green light. He also changed the circadian rhythm in 3 hours. In another experiment conducted in Toronto, people who were exposed to bright light but wearing blue blocking glasses had the same melatonin levels compared to those who were in a dimly lit room.
Another study that analyzed adolescents using their mobile phones or gadgets during the night found that only one hour of exposure to blue light reduced melatonin levels by 23%. In two hours, it was further reduced to 38%.
Similarly, red light seems to have almost no effect on the circadian rhythm compared to blue light. Some people even advise using a dark red light as bed light since it would not interrupt sleep patterns.
The ill effects of blue light
So what effect does blue light really have on the body? Unfortunately, it is not just that it affects sleep. Excessive exposure to blue light has now been linked to weight gain, heart disease, depression and even some forms of cancer.
Melatonin has anticancer properties and low levels at night can increase the risk of cancer. In one study, women who worked night shifts had low levels of melatonin and a 50 to 75% higher risk of developing breast cancer in their lives.
People who are exposed to blue light at night have a lower level of ihttp://healthonway.com/