Smith, Furó, and Smith (2007) described the action of partial
acylglycerols in the modification of crystal morphology, by binding
them to a crystalline face and preventing deposition of triacylglycerol
molecules on that surface, reducing crystalline growth in this
region. Wright and Marangoni (2003) also stated that when impurities
were present in a fat crystal, they generally modified the
growth of certain faces, changing the morphology of the crystalline
structures. Even so, the authors found no changes in the crystalline
morphology of milk fat due to the removal of minor compounds or
the addition of diacylglycerols.