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0:56
When you make vitamin D through your skin, it’s not just about UVB converting 7-dehydrocholesterol into cholecalciferol. That process happens within a redox-rich, hydrated microenvironment, one that’s regulated by light, temperature, and circadian enzymes like the cytochrome P450 family. Simultaneously, infrared and UVA wavelengths stimulate endothelial nitric oxide synthase (eNOS), producing nitric oxide, which improves blood flow and supports sulfation. Sulfated vitamin D and sulfated choleste
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