Variations in skin tone correlate with

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All of the above factors (exposure to sunlight, folate stores in the body, vitamin D production, and melanin expression) have been shown to play a role in determining variations in skin tone. Sun exposure leads to tanning due to increased melanin production, folate deficiency can lead to paler skin, increased vitamin D production in response to sunlight may contribute to darker skin, and variations in melanin expression can result in differences in skin color.

Variations in Skin Tone Correlate with