Impact of different choline supplements on endogenous PC synthesis by PEMT
Our data show that, in response to (D9-PO)PC, the plasma concentrations of free (D9-)choline and (D9-)betaine are decreased but their hepatic use for the synthesis of (D3-)methionine as a methyl donor and (D3-)PC synthesis from PE via the PEMT pathway is not decreased. Hence, hepatic secretion of VLDL, where both PC synthesis de novo and via the PEMT pathway are essential [