Why did people from southern Asia commonly suffer from beriberi sickness in late 1800s?

eating toxic sea algae
inbreeding
drinking dirty water
eating mostly white rice
Beriberi is a sickness caused by extreme de­fi­cien­cy of vitamin B1, thi­amine. White rice is gen­er­al­ly a poor source of vi­ta­min­s, and com­plete­ly lacks thi­amine. The sickness became common in Asia in 1800s with the in­creased pro­cess­ing of rice.

Answers distribution

eating toxic sea algae
inbreeding
drinking dirty water
eating mostly white rice
answers
flagUkraine
0%
13%
0%
80%
15
flagFinland
0%
7%
15%
76%
13
flagSwitzerland
0%
7%
15%
76%
13
flagSpain
13%
6%
13%
66%
15
flagItaly
0%
11%
23%
65%
26
flagRepublic of Ireland
2%
11%
22%
64%
45
flagthe Netherlands
10%
13%
20%
56%
30
flagCanada
11%
17%
17%
52%
17
flagIndia
24%
3%
20%
51%
29
flagGermany
8%
15%
29%
47%
106
flagthe United States
7%
10%
37%
44%
85
flagPoland
7%
13%
35%
42%
9971
flagNorway
0%
10%
47%
42%
19
flagthe United Kingdom
9%
12%
36%
40%
193
flagSweden
7%
15%
38%
38%
13
flagUnknown
10%
19%
36%
32%
446
flagDenmark
9%
27%
36%
27%
11
flagFrance
4%
21%
47%
26%
23

Gender

men35%
women40%
eating toxic sea algae
8%
5%
inbreeding
20%
15%
drinking dirty water
35%
38%
eating mostly white rice
35%
40%

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Why did people from southern Asia commonly suffer from beriberi sickness in late 1800s?
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Author: smyru
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