Regarding practical applications, which light period is biologically superior for Vitamin D production despite morning light often being aesthetically preferred?
Answer
Afternoon light.
When comparing the biological utility of morning versus afternoon sunlight, the afternoon hours are superior for boosting Vitamin D levels. This superiority stems directly from the physical phenomenon that the sun's higher angle during the afternoon (10:00 AM to 3:00 PM window) minimizes atmospheric filtering, allowing a higher concentration of biologically active UVB rays to penetrate to the skin. Although the soft, warm quality of early morning light might be aesthetically pleasing, that same low angle causes atmospheric interference to filter out the necessary UVB required for efficient Vitamin D synthesis.
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