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
5%
0%
0%
94%
17
flagSwitzerland
0%
0%
6%
93%
15
flagMalaysia
0%
0%
0%
92%
13
flagAustria
0%
0%
0%
92%
13
flagPakistan
4%
2%
0%
91%
46
flagGermany
5%
2%
0%
90%
107
flagthe United Arab Emirates
0%
0%
10%
90%
10
flagCanada
0%
3%
3%
86%
30
flagthe United Kingdom
5%
3%
5%
85%
114
flagRepublic of Ireland
7%
7%
0%
85%
14
flagthe Philippines
5%
5%
5%
84%
19
flagPoland
7%
5%
4%
81%
12070
flagAustralia
3%
3%
6%
81%
33
flagIndia
6%
5%
4%
80%
145
flagthe United States
4%
2%
12%
77%
291
flagUnknown
5%
5%
15%
75%
20
flagGreece
6%
13%
6%
66%
15
flagNigeria
7%
23%
7%
46%
13