The DMG is a naturally occurring intermediary metabolite in the choline to glycine metabolism,
and acts as a methyl donor (Tonda and Hart, 1992;Slow et al., 2004). Kalmar et al. (2011) suggested that in poultry DMG may play a sparing effect on choline, which can be used for its specific functions other than methylation. Specifically, choline is considered a lipotropic
factor due to its function in the regulation of hepatic lipoprotein synthesis.