Cal. Food & Agr. Code § 38873
When offered for sale, kefir, reduced-fat kefir, lowfat or light (lite) kefir, and nonfat, skim, or fat-free kefir shall be labeled, on a principal panel of the container, with the name of the product, the name and address of the manufacturer or distributor, and a statement whether it is made from pasteurized milk or certified raw milk. If the name and address of the distributor are used, the factory license number of the manufacturer shall also appear on the carton or container. Kefir shall be labeled "Kefir a Cultured Milk." Reduced-fat kefir shall be labeled "Reduced-fat Kefir a Cultured Milk." Lowfat or light (lite) kefir shall be labeled "Lowfat Kefir a Cultured Milk" or "Light (Lite) Kefir a Cultured Milk." Nonfat, skim, or fat-free kefir shall be labeled "Nonfat Kefir a Cultured Milk," "Skim Kefir a Cultured Milk," or "Fat-free Kefir a Cultured Milk."
Ca. Food and Agric. Code § 38873