The combination of probiotics with whey protein isolate (WPI)
will add more value to processed food products.
The major disadvantage associated with this combination is the instability of the
bacteria, as WPI is an ideal nutritional source for microorganisms
to grow and multiply if the moisture content is high. Based on
these considerations, spray drying which is a well-established
technology, would be a well suited choice for the preservation of
bacteria for food fermentation and therapeutic applications particularly as it is more economical compared
to freeze drying.