The Ra Optics Blog
Can I get vitamin D on a cloudy day?
The synthesis of vitamin D is triggered by skin exposure to ultraviolet light. Even on a cloudy day, the level of ultraviolet light is sufficient enough to activate this response.
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Why we need to sunbathe regularly
Sunbathing is not damaging to our health, but we need to prepare our skin for it. When we don't, the skin doesn't have its own sunscreen, our melanin, to protect it from the harmful UV light.
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