Cold pressed oil extraction is the preferred method for seeds with high contents of oil,
such as colza. Generally speaking, expeller pressing is less complex, more cost efficient and
safer than solvent extraction. Moreover, cold pressed oils retain their natural properties better.
Cold pressed colza oil has been found to have numerous health benefits. This was an original and
unique study conducted as part of the research for the international Codex standard for cold
pressed fats and oils, and aims to examine the chemical properties of two varieties of Iranian colza seed, Hyola and
Okapi. The studied factors included (a) chemical properties, and (b) physicochemical and quality characteristics.
Based on our findings, both varieties of colza seeds in this study had satisfactory levels of oleic and linoleic acid,
and no trans-fatty acids. Although both samples had good nutritional properties, the Hyola variety was higher in
oleic acid, indicating better oxidative stability. Due to the considerable amounts of β-sitosterol in both varieties, they
may be effective in reducing cholesterol and preventing cancer.