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. 2013 Jan 1;5(1):51–108. doi: 10.4161/derm.24494

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Copyright © 2013 Landes Bioscience

This is an open-access article licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. The article may be redistributed, reproduced, and reused for non-commercial purposes, provided the original source is properly cited.

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graphic file with name de-5-51-g25.jpg — Figure 25. Conversion rate of 7-dehydrocholesterol (7-DHC) to vitamin D depending on time of the day and season in Boston (42° North). The measurements were conducted after exposing ampoules filled with 7-DHC to sunlight. Holick, copyright 2013, reproduced with permission.