*3.4.3 Vitamin K*

Low levels of vitamin K have been observed in 1.8% post RYGB and 7.4% post SADI patients one year after surgery [31]. However, clinical symptoms such as easy bruising, and increased bleeding are rare [6]. Some cases of fetal and newborn intracranial hemorrhage related to maternal vitamin K deficiency have been described after BPD/DS [27], and have been also reported after LAGB in a pregnant woman with prolonged vomiting due to slippage of the gastric band resulting in gastric outlet obstruction [32].
