Several groups have tried to find media and growth conditions that would optimize
the production of kefiran. Toba et al.56,60 were able to produce 80 mg polysaccharide/L
of media using a whey-based growth medium that had increased glucose and added
trypticase peptone compared to their standard whey-based medium. They also
reported that the viscosity of the fermented drink was directly proportional to the
polysaccharide content, and they used viscosity measures to gauge the efficiency of
their different growth media