NbActiv1™ neuron culture medium is a pre-mixed version of Neurobasal™ + B27™ + Glutamax™. NbActiv1, the predecessor to our new NbActiv4, Neurobasal and B27 was developed in 1993 by our founder Greg Brewer,(PM:8377226). It is a serum-free medium optimized for neuron survival after 4 days of growth. Many neuron types can be cultured in NbActiv1, (PM:8600300). Glutamax even replaces the usual glutamine.