Methods of reducing the viscosity of a liquid flowing through process equipment by introducing into the liquid a quantity of micro- and/or nano-sized bubbles are disclosed. In particular embodiments, the liquid comprises a plurality of very fine charged particles, such as proteins. The bubbles that are introduced into the liquid induce within the liquid/bubble interface a charge that is of the same polarity to that of the charged particles dispersed within the liquid. Liquid products comprising a plurality of micro- and/or nanobubbles are also disclosed.
