title: Preventive effect of cinnamon essential oil on lipid oxidation of vegetable oil.
abstract: BACKGROUND
  Lipid oxidation is the main deterioration process that occurs in vegetable oils. This process was effectively prevented by natural antioxidants. Cinnamomum zeylanicum (Cinnamon) is rich with antioxidants. The present study was conducted to evaluate the effect of cinnamon on malondialdehyde (MDA) rate production in two high consumption oils in Iranian market.
  
  
  METHODS
  Chemical composition of cinnamon essential oil was analyzed by gas chromatography-mass spectroscopy (GC-MS). 200 µl each oil, 50 µl tween 20, and 2 ml of 40 Mm AAPH solutions were mixed and the prepared solution was divided into four glass vials. Respectively, 50 µl of 500, 1000 and 2000 ppm of cinnamon essential oil were added to three glass vials separately and one of the glass vials was used as the control. All of the glass vials were incubated at 37° C water bath. Rate of MDA production was measured by thiobarbituric acid (TBA) test at the baseline and after the 0.5, 1, 2, 3 and 5 hours.
  
  
  RESULTS
  Compounds of cinnamon essential oil by GC-MS analysis such as cinnamaldehyde (96.8%), alpha-capaene (0.2%), alpha-murolene (0.11%), para-methoxycinnamaldehyde (0.6%) and delta-cadinen (0.4%) were found to be the major compounds. For both oils, maximum rate of MDA production was achieved in 5th hours of heating. Every three concentrations of cinnamon essential oil significantly decreased MDA production (P < 0.05) in comparison with the control.
  
  
  CONCLUSIONS
  Essential oil of cinnamon considerably inhibited MDA production in studied oils and can be used with fresh and heated oils for reduction of lipid peroxidation and adverse free radicals effects on body.
authors.affiliation: Isfahan Cardiovascular Research Center, Isfahan Cardiovascular Research Institute, Physiology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Mahtab
authors.initials: M
authors.lastname: Keshvari
authors.forename: Sedigheh
authors.initials: S
authors.lastname: Asgary
authors.forename: Abbas
authors.initials: A
authors.lastname: Jafarian-Dehkordi
authors.forename: Somayeh
authors.initials: S
authors.lastname: Najafi
authors.forename: Seyed Mojtaba
authors.initials: SM
authors.lastname: Ghoreyshi-Yazdi
keywords: Cinnamon; Essential Oil; Lipid Peroxidation; Vegetable Oils