Soyabean Casein Digest Medium is recommended by various pharmacopeias as a sterility testing and as a microbial limit testing medium. This medium is a highly nutritious medium used for cultivation of a wide variety of organisms. Soyabean Casein Digest HiCynthâ„¢ Medium is the modification of the same using chemically defined peptone free from animal and vegetable peptones to avoid BSE/TSE/GMO risks associated with animal peptones.