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%
15
flagNorway
0%
0%
0%
100%
11
flagSwitzerland
0%
0%
6%
93%
16
flagAustria
0%
0%
0%
93%
16
flagMalaysia
0%
0%
0%
92%
13
flagPakistan
4%
2%
0%
91%
48
flagGermany
5%
3%
0%
90%
141
flagthe United Arab Emirates
0%
0%
10%
90%
10
flagItaly
5%
0%
5%
88%
18
flagCanada
0%
3%
3%
87%
31
flagthe United Kingdom
6%
3%
5%
84%
127
flagAustralia
2%
2%
5%
84%
38
flagPoland
7%
5%
4%
81%
12488
flagIndia
5%
5%
4%
81%
152
flagthe Philippines
9%
4%
4%
81%
22
flagRepublic of Ireland
12%
6%
0%
81%
16
flagthe United States
4%
2%
12%
77%
305
flagUnknown
5%
5%
15%
75%
20
flagGreece
5%
11%
5%
70%
17
flagNigeria
7%
23%
7%
46%
13