Even a small light source can disrupt the body's hormonal balance. Light emitted from smartphones, televisions, or computers also contributes to melatonin depletion. Additionally, other biological processes are affected. When the lights are on during the night, melatonin is the first to suffer. Melatonin is well-known for its role in regulating sleep, maintaining the circadian rhythm, and controlling reproductive hormones. As a result, disrupted sleep can lead to hormonal imbalances, causing fatigue, irregular cycles, or acne.
Hormonal ImbalanceA study shows that exposure to artificial light at night increases the risk of depression. Moreover, disruptions in the circadian rhythm can worsen existing depressive symptoms. Interestingly, red light has a less detrimental effect, as we are less sensitive to red wavelengths. In some cases, it is even used to treat insomnia. If you are accustomed to sleeping with the lights on, consider using red lighting to safeguard your health.
Depression3. Negative Impact on Reproductive Health
A study reveals that exposure to artificial light at night can increase the risk of infertility. The experiment was conducted on female rats. Those who slept with the lights on at night were more likely to become infertile. It is also believed that the circadian rhythm (the body's internal clock) affects the timing of reproductive processes in women.
Another study followed night-shift nurses and the effects of light exposure at night. It turns out that most nurses complained of irregular menstrual cycles.
Negative Impact on Reproductive HealthMelatonin not only lowers body temperature but also reduces blood pressure. If you're exposed to artificial light at night, your melatonin production will be suppressed. As a result, your blood pressure increases. This frequent fluctuation can raise the risk of cardiovascular diseases and strokes.
Cardiovascular IssuesAccording to a study published in the JAMA Internal Medicine journal, leaving the TV or lights on in the room while sleeping can cause women to gain 5kg over five years.
Artificial light sources slow down metabolism, disrupt the circadian rhythm, and interfere with the production of melatonin, a hormone that regulates sleep and negatively impacts meal quality. This contributes to obesity. Another study tracking over 43,000 women revealed that those who slept with the TV on gained weight. The change occurred regardless of sleep quality or duration.
Weight Gain
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