In summary, the influences of hydrophilic antioxidants,metal chelators,
and food grade emulsifiers on the oxidative stability of base algae
oil and water-in-algae oil emulsion were investigated by monitoring
the formation of propanal during storage. GTE and AA, which showed
strong ability to protect endogenous α-tocopherol against oxidative
degradation, are the most efficient hydrophilic antioxidants to restrain
algae oil oxidation. PC 75 and Lyso-PC contain significant amount of
α-tocopherol and act as the antioxidants in base algae oil. GSE, GSE-p,
and ametal chelator only render protection forw/o emulsions stabilized
by PGPR. The present study adds valuable information on PUFA protection
by protecting the degradation of tocopherols in base algae oil or
chelating transition metals in water-in-algae oil emulsions.