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by cageface
2826 days ago
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B12 is produced by bacteria and we used to get plenty of it from the environment. Public sanitation means we don't have those bacteria in our food and water anymore so you need to supplement. A lot of meat is also artificially enriched with B12 though and a lot of meat eaters are also deficient so a B12 supplement is probably a good idea for most people anyway. |
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