Quote -1

evidence suggests that there is insufficient vitamin D produced in the winter at latitudes pole-ward of about 40degrees.

Quote-21

MED full body exposure corresponds to an oral dose of 10 000– 25 000 IU of vitamin D. For a fair skinned person, 1 MED (i.e. 2.5 SED) is accumulated in _14 min when UVI = 12 (UVEry = 0.3 W m)2).

Quote-3

so sufficient vitamin D should easily be produced in less than 20 min of full body

exposure. Even if there were an error of 300% in this calculation, sufficient vitamin D should be produced in less

than 1 h.

UV Radiation: Balancing Risks and Benefits

Richard L. McKenzie*1, J. Ben Liley1 and Lars Olof Bjo¨ rn2

Quote -1

evidence suggests that there is insufficient vitamin D produced in the winter at latitudes pole-ward of about 40degrees.

Quote-21

MED full body exposure corresponds to an oral dose of 10 000– 25 000 IU of vitamin D. For a fair skinned person, 1 MED (i.e. 2.5 SED) is accumulated in _14 min when UVI = 12 (UVEry = 0.3 W m)2).

Quote-3

so sufficient vitamin D should easily be produced in less than 20 min of full body

exposure. Even if there were an error of 300% in this calculation, sufficient vitamin D should be produced in less

than 1 h.

Richard L. McKenzie*1, J. Ben Liley1 and Lars Olof Bjo¨ rn2