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Why do we need sunlight for good health?

Dr. David L. Katz, MD, MPH
Preventive Medicine
Studies indicate vitamin D may influence the absorption of calcium in the intestine and the immune system, helping to defend against cancer, especially colon cancer. Our skin manufactures vitamin D when exposed to sunlight.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.