Sunlight: Good and Bad for Your Skin

Original Title

Human Skin and Sunlight: A Comprehensive Review of UV Radiation, Photoreactions, and Photoprotection

Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms

Summary

Your skin protects your body, and sunlight helps make vitamin D and keeps your body clock running. But too much sun can hurt your skin by causing damage, aging, and even cancer.

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Surprising Findings

Chronic sun exposure disrupts the skin’s circadian rhythm

Most people assume circadian rhythms are only about sleep and light exposure to the eyes, not realizing skin cells also follow a daily cycle that sunlight can disrupt.

Practical Takeaways

Get short, regular sun exposure (e.g., 10–15 minutes of midday sun on arms and face) to support vitamin D and circadian health without burning.

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