There are several branches (franchises) of GNC - including one in Bella Vista Mall, one in Plaza Andalucia on Lincoln/Gustavo Mej?a Ricart, one in La Sirena on Churchill.
GNC - About Us
For wholefood shops stocking vitamins try Madre Tierra in Zona Universitaria, Org?nica in Plaza Catalunya in Piantini on Ave. Gustavo Mej?a Ricart, and others.