[jaekwon]

from what i've been reading, sitting / staying up late is injurious, actually.

[metamemetics]

3rd shift workers have increased mortality\risk of cancer, largely due to Vitamin D deficiency. I agree Jefferson's statement is accurate.

Nowadays we know vitamin D exists so you can take a supplement or consciously eat certain foods (oily fish such as sardines http://www.seriouseats.com/2010/01/alton-browns-sardine-avoc...)