After 15 days of storage, an increase in particle size of oil droplet was found in all samples (p < 0.05). This result might be due to droplet aggregation (flocculation or coalescence) during the storage (Djordjevic, Cercaci, Alamed, McClements, & Decker, 2008). An appreciable increase in particle size and PDI was observed in emulsions stabilised by the control α-La and α-La–CA or EGCG mixture. The highest rate of the increase in particle size was observed in the emulsion stabilised by the control α-La (p < 0.05). However, there was no significant change in size of oil droplet in emulsions stabilised by α-La–CA or EGCG covalent complex. This implied that α-La–EGCG and α-La–CA covalent complex could stabilise the β-carotene emulsion with extension of storage time.