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).
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Answers by country

vitamin A
vitamin B
vitamin C
vitamin D
answers
flagthe Netherlands
0%
0%
0%
100%
17
flagNorway
0%
0%
0%
100%
11
flagAustria
0%
0%
0%
95%
20
flagPakistan
4%
2%
0%
91%
49
flagGermany
4%
3%
1%
90%
184
flagItaly
5%
0%
5%
90%
20
flagthe United Arab Emirates
0%
0%
10%
90%
10
flagSwitzerland
0%
0%
10%
89%
19
flagAustralia
2%
2%
4%
86%
44
flagMalaysia
6%
0%
0%
86%
15
flagCanada
0%
3%
6%
84%
33
flagRepublic of Ireland
10%
5%
0%
84%
19
flagthe United Kingdom
6%
2%
6%
83%
149
flagPoland
7%
5%
4%
82%
12968
flagIndia
5%
4%
4%
82%
170
flagthe Philippines
8%
4%
8%
79%
24
flagthe United States
4%
2%
11%
78%
318
flagGreece
4%
9%
4%
76%
21
flagUnknown
5%
5%
15%
75%
20
flagNigeria
7%
23%
7%
46%
13