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%
12
flagNorway
0%
0%
0%
100%
11
flagItaly
6%
0%
0%
93%
16
flagGermany
4%
2%
0%
91%
82
flagMalaysia
0%
0%
0%
91%
12
flagPakistan
4%
2%
0%
90%
43
flagSwitzerland
0%
0%
9%
90%
11
flagthe United Arab Emirates
0%
0%
10%
90%
10
flagCanada
0%
3%
3%
86%
29
flagthe United Kingdom
5%
3%
5%
83%
102
flagRepublic of Ireland
8%
8%
0%
83%
12
flagthe Philippines
5%
5%
5%
82%
17
flagPoland
7%
5%
4%
81%
11757
flagIndia
5%
5%
4%
80%
134
flagthe United States
4%
2%
13%
77%
279
flagAustralia
4%
4%
8%
75%
24
flagUnknown
5%
5%
15%
75%
20
flagGreece
7%
15%
7%
61%
13
flagNigeria
8%
25%
8%
41%
12