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B12 levels increased significantly more for pregnant than non-pregnant women when given an oral dose of 1,000 g (respective increase of 195 vs 117 pmol/l) or 500 g (respective increase of 147 vs 95 pmol/l), but not for 250 g (respective increase of 11 vs
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As for adverse events, a similar percentage of participants across the treatment groups experienced the most common side effect of gastrointestinal upset [2]
Hu J, Zhang Y, Jiang X, Zhang H, Gao Z, Li Y, Fu R, Li L, Li J, Cui H, Gao N
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