🌃 Bright Nights, Silent Damage: How Light Affects Your Heart 📌 New evidence from JAMA Network Open suggests that brighter nighttime light exposure is linked to a higher risk of cardiovascular disease — beyond sleep quality alone. 🔬 Why this study matters: • Personal wearable light sensors, not satellite estimates • ~9.5 years of follow-up, 88,000+ participants • Associations remained independent of sleep, lifestyle, and genetic risk ❤️ Increased risk observed for: • Coronary artery disease • Myocardial infarction • Heart failure • Atrial fibrillation • Stroke 👩‍⚕️ Clinical insights: • Stronger associations in women • Younger individuals showed greater links with AF and HF 🧠 Proposed mechanism: Nighttime light → circadian rhythm disruption → hormonal & metabolic imbalance → ↑ cardiovascular risk 🛌 Take-home message: Darkness at night is not a luxury — it’s cardiovascular protection.