AdvoCare International LP is an American multi level marketing company that sells dietary supplements. The company headquartered in Plano Texas was founded in 1993 by Charles Ragus and employed roughly 250 people in 2013.AdvoCare International LP is an American multi level marketing company that sells dietary supplements. The company headquartered in Plano Texas was founded in 1993 by Charles Ragus and employed roughly 250 people in 2013.