Can you absorb vitamin D through a window?

6th June 2010
Can you absorb vitamin D through a window? (GETTY)

Asked by: Steven Collins, by E-mail

You don’t absorb vitamin D from the Sun, your skin synthesises it in response to sunlight. It’s the UVB portion of the ultra-violet spectrum that’s needed. This wavelength range is effectively blocked by glass so you can become deficient in vitamin D if you don’t go out and don’t eat enough oily fish or dairy products to compensate.
 

 


Get more fascinating Q&As from BBC Focus magazine by following @sciencefocusQA

You are currently reading: Can you absorb vitamin D through a window? - 6th June