Fig. 5 presents results of stability measurements. Stability of the emulsions ranged from 32.2% for unheated and 28.4% to 47.5% for heated protein emulsions. The higher temperature of protein preheating the higher emulsion stability. There was almost 12% decrease in stability of emulsions obtained from unheated and heated to 60 °C proteins. In fact, unheated protein emulsions also passed heating procedure, like other emulsions, but on the stage of the premix, when the mixture of oil and protein dispersion was heated to the temperature of homogenization (60 °C). This clearly shows that heating may be detrimental in relation to stability, if the process is carried out when oil is already dispersed to some extent in a continuous phase and oil droplets are covered by proteins. Usually, an increase in stability is attributed to a decrease in droplet diameter (Euston and Hirst, 1999 and Srinivasan et al., 2003). Since higher temperatures of protein preheating generally resulted in higher emulsion stability, but emulsifying capacity of heated proteins decreased and light scattering studies pointed at an increase in emulsion particle sizes, one can conclude that not the emulsion globules, but rather protein nano-particles available in the system were responsible for stability of studied emulsions. These particles are probably intermediates of heat-induced protein aggregation with limited surface active properties, but still able to improve emulsion stability.