Which vitamin is produced in the skin during sun bathing?

vitamin A
vitamin B
vitamin C
vitamin D
Vitamin D is syn­the­sized from choles­terol in the skin with the help of the natural ul­tra­vi­o­let wave­length of sun­light. Sup­ple­men­ta­tion of vitamin D is rec­om­mend­ed only for sun-de­prived people (eg. elderly or living in the Far North).

Answers distribution

vitamin A
vitamin B
vitamin C
vitamin D
answers
flagNorway
0%
0%
0%
100%
17
flagBulgaria
0%
0%
0%
100%
11
flagCanada
0%
5%
0%
95%
20
flagRepublic of Ireland
5%
0%
0%
94%
38
flagSweden
0%
0%
0%
94%
18
flagItaly
8%
0%
0%
91%
23
flagthe Netherlands
9%
0%
0%
90%
21
flagGermany
7%
7%
0%
85%
109
flagthe United States
4%
2%
7%
84%
198
flagPoland
6%
5%
4%
82%
6856
flagUU
15%
3%
0%
80%
26
flagthe United Kingdom
11%
4%
3%
79%
154
flagIndia
4%
2%
6%
79%
49
flagFrance
13%
13%
6%
66%
15

Gender

men78%
women85%
vitamin A
7%
6%
vitamin B
8%
4%
vitamin C
4%
3%
vitamin D
78%
86%

Language versions

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Which vitamin is produced in the skin during sun bathing?
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80%

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Illustration: Pedro Simões
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