Sunlight through windows may cause sunburn due to UVA penetration, Australians need sun protection with UV index above 3 for healthy vitamin D levels.

Sunlight through windows can cause sunburn & skin damage due to UVA penetration, as glass blocks 95% of UVB rays needed for vitamin D production. To maintain healthy vitamin D levels, Australians should spend brief periods outside without protection when UV index is 3 or above, and use sun protection when it's higher. Vitamin D deficiency can lead to rickets, osteoporosis, & osteomalacia.

June 27, 2024
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