Why can humans produce Vitamin B from sunlight but not from artificial light sources?
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It all depends upon the light source. Artificial light is generally low in the UVB part of ghe spectrum.
It’s this wavelength of light that causes the human body to produce vitamin D.
If you have an Artificial light source with the correct wavelength output it will cause vitamin D to be produced.
There’s some evidence that Artificial UVB light therapy can help people with vitamin D definancy- people who have Cystic fibrosis for example who cant absorb Vitamin D from their diet.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2846322/
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