Hauser continued his studies in the USA, receiving degrees in naturopathy and chiropractic from several American institutions. In 1925 Hauser joined his brother-in-law, Sebastian Gysin, in the Milwaukee firm of Modern Products, which already manufactured an herbal laxative developed by Gysin, called Swiss Kriss. Hauser helped to market a series of food products produced by Modern Products. Modern Products continues to this day, and Hauser's line of seasonings and broths are found in most health food stores. Another company, Gayelord Hauser of France, markets an even more extensive line of food products and publications in that country.