Šķūnis nodrošinājums Lauksaimniecības can you get vitamin d from a light bulb Bārddzinis Kalpone Ithaka
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Vitamin D bulb for use in the home - or perhaps office | VitaminDWiki
Can Using an Indoor UV Device Improve Your Vitamin D Levels? - GrassrootsHealth
Can lightbulbs help the body produce vitamin D like the sun does? - Quora
Ultraviolet B Light Emitting Diodes (LEDs) Are More Efficient and Effective in Producing Vitamin D3 in Human Skin Compared to Natural Sunlight | Scientific Reports