Wyeast Laboratories, Inc. spurred the craft brewing revolution in 1986 by introducing the original Premium Liquid Yeast for professional and home brewers – the first of its kind. And we’ve spent the last 35 years changing the landscape of the industry for the better, with our science-based approach and dedication to customer service & technical support. Our Culture Collections represent decades of selecting and isolating pure cultures from around the world with brewers, winemakers, collaborators, and friends to offer a global selection and unparalleled quality.