InfographicsMapping Health Are you vitamin D deficient? July 8, 2015 Alex This post may contain affiliate links. As an Amazon Associate, we earn from qualifying purchases. Related Posts:How many structurally deficient bridges are in the U.S.?Blonde Hair MapU.S. aging dams are in need of repairThe Best Editions of Monopoly Board GameThe Best Scratch-Off Maps in 2025Privacy PolicyPotato Consumption in EuropeThe Most Comfortable Places to Live in the United States