Light could suppress the sleep hormone melatonin. Sleeping with a cellphone, bright alarm clock on or a television next to your bed puts women at risk for weight gain, a new study found. Women who ...

After examining 13 million hours of light exposure data, researchers found that experiencing bright light during the dark hours can significantly increase the risk of heart failure and heart attack.

Blue light has acquired a dubious reputation in recent years, frequently blamed for everything from disrupted sleep patterns to digital eye strain. This high-energy light, emitted abundantly by our ...

Women's Health may earn commission from the links on this page, but we only feature products we believe in. Why Trust Us? People who were exposed to higher levels of artificial light at night had ...