Functional Formularies formulas contain complete protein as defined by their protein sources offering all essential amino acids required by human metabolism.  Each formula contains a variety of whole food, plant-based ingredients that offer all of the 10 complementary amino acids in adequate quantities.

Although no one ingredient provides a complete protein, the combination of two or more plant foods has long been recognized by all government nutrition and medical organizations, as well as the World Health Organization, as an effective means of supplying all age groups with ample quality protein.