Angela Pezic, Anne-Louise Ponsonby, Fergus J Cameron, Christine Rodda, Justine A Ellis, Jane Halliday, William Siero, Robyn M Lucas and Terence Dwyer Constitutive and Relative Facultative Skin Pigmentation among Victorian Children Including Comparison of Two Visual Skin Charts for Determining Constitutive Melanin Density Photochemistry and Photobiology 89
Constitutive skin pigmentation is the natural skin color, and facultative skin pigmentation (tanning) is associated with exposure to the sun and is often defined relative to constitutive skin pigmentation at an unexposed skin site. The figure shows that there was no variation for constitutive skin pigmentation by month of interview. For relative facultative skin pigmentation, there was greater variation, with less tanning midyear (winter) and most tanning during the summer months.
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