Wyeast Laboratories, Inc. has distributed fresh "Pure Liquid Yeast" cultures worldwide since 1986. Our staff of experienced brewers/microbiologists, provide technical support, assistance with yeast strain selection and yeast strain management. We provide our customers with customized cell counts appropriate for strain and style. Our Products are guaranteed 100% Pure & Fresh. Wyeast also sells Tanal products for colloidal stability & anti-oxidant properties as well as Yeast Nutrients.