Yes. If you don’t get enough blue light during the day – or too much at night – your body clock can fall out of sync. Over time, this can lead to problems like weight gain, low energy, heart issues, or feeling down. Just like eating well and staying active, getting the right light at the right time helps keep your body healthy. This isn’t theoretical, it’s backed by decades of circadian science, and it’s been documented in over 25,000 peer-reviewed studies. The World Health Organization now classifies circadian disruption as a probable carcinogen. And Harvard researchers link nighttime blue light to cancer, diabetes, and metabolic disease.