| Summary: | Studies have reported that cholesterol, a molecule found mainly in animals, is also present in some plants and algae. This study aimed to determine whether cholesterol exists in three dehydrated algae species, namely, <i>Pyropia tenera, Saccharina japonica,</i> and <i>Undaria pinnatifida</i>, and in one plant species, namely, <i>Perilla frutescens</i> (four perilla seed oil samples were analyzed). These species were chosen for investigation because they are common ingredients in East Asian cuisine. Gas chromatography-flame ionization detection (GC-FID) analysis found that cholesterol was present in <i>P. tenera</i> (14.6 mg/100 g) and in all four perilla seed oil samples (0.3–0.5 mg/100 g). High-performance liquid chromatography with evaporative light-scattering detection (HPLC-ELSD) also demonstrated that cholesterol was present in <i>P. tenera</i> (14.2 mg/100 g) and allowed the separation of cholesterol from its isomer lathosterol. However, cholesterol could not be detected by HPLC-ELSD in the perilla seed oil samples, most likely because it is only present in trace amounts. Moreover, liquid chromatography-tandem mass spectrometry (LC-MS/MS) confirmed the presence of cholesterol in both <i>P. tenera</i> and perilla seed oil. MRM results further suggested that lathosterol (a precursor of cholesterol) was present in <i>P. tenera.</i>
|
|---|