*3.7. Oxidative Stability*

The lipid hydroperoxides, which were the primary oxidation products, were examined by FTIR to evaluate the oxidation stability of CS@CBLO NPs according to the previous literature [46]. The CBLO and CS@CBLO NPs were stored at room temperature for 4 weeks and FTIR measurement was performed every 2 to 3 days. The FTIR spectrum was monitored at a specific wavenumber, around 3500 cm−<sup>1</sup> to 3400 cm−<sup>1</sup> for hydroperoxides (ROOH), 967 cm−<sup>1</sup> for trans double bond and 973 or 976 cm−<sup>1</sup> for secondary oxidation products, such as aldehydes or ketones supporting isolated trans-double bonds, in order to observe the oxidation stability of CBLO with or without encapsulation. The ratio of maximum absorbance wavenumber in the region of 3400–3500 cm−<sup>1</sup> was defined as fn/fo. The fo

was the initial maximum absorbance wavenumber and fn was the maximum absorbance wavenumber at each time point.
