Formation of nanoemulsions using different types and concentrations of emulsifiers.
Whey protein isolate or lactoferrin produced smaller droplets than Tween 20.
Lactoferrin nanoemulsions had good stability to heat treatment, pH and salt.
Tween 20 nanoemulsions were unstable to high temperature at 90 °C for 15 min.
Whey protein isolate nanoemulsions unstable at pH 4.5–5.5 and at >30 mM CaCl2.