Assertion: margarine's fat | /r/PartOf | 50% of cell membranes
Facets:
Source sentences:
text: As mentioned at the beginning, fats serve important physiological functions: saturated fats make up ~ 50% of cell membranes, are important for bone calcium, heart, liver & kidney function, and support the immune system & detox mechanisms (Fallon-Morell 2009).