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The vitamin is found in seafood, meat, milk, and eggs, so vegetarians and vegans are at risk
Seiwerth S, Rucman R, Turkovic B, Sever M, Klicek R, Radic B, et al
Jantaruk P, Roytrakul S, Sitthisak S, Kunthalert D
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This condition further reduces the stomachs ability to produce intrinsic factor-a protein needed to absorb vitamin B12 in the small intestine
Substances under S2.2.3 are non-Specified Substances under the WADA Code
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