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But no B12 either.
Just do keep the dialogue on track, B12 is made by bacteria. That bacteria lives in soil and in animals guts, also in insects, but the intensive use of pesticides is also killing the bacteria in the soil so you get less from non organic foods. So one can get it from eating dirty food, and drink unclean water, or snacking on insects.
Humans also have the bacteria in the gut that produces B12, but it is produced lower in our gut than where we absorb it, so in order to sustain ourselves we would have to eat our own feces.
So dirt, bugs or feces vs. a supplement.
No soil on my Oca :)
Oca is also an excellent source of zinc (100 grams of oca covers 12% of the daily value for zinc) and vitamin B2 (55% of the daily value)
Source: https://www.healwithfood.org/nutrition-facts/oca-oxalis-tuberosa.php#ixzz69r1L1tUw