GlutaGO™ Supplement is 200 mM dipeptide L-alanyl-L-glutamine in 0.85% sodium chloride. GlutaGO™ Supplement is highly soluble, heat-stable, and does not spontaneously break down to form ammonia for longer lasting cultures. GlutaGO™ Supplement can be used as a direct substitute for L-glutamine at equimolar concentrations in both adherent and suspension mammalian cell cultures.