Cold-pressed rapeseed (Brassica napus) oil: Chemistry and functionality.

Area of Science:

• Agricultural Science
• Food Science
• Nutritional Science

Background:

• Rapeseed oil is a globally significant edible oil, valued for its low erucic acid and glucosinolate content.
• Cold-pressed rapeseed oil is gaining attention as a healthier alternative to refined oil due to minimal processing.

Purpose of the Study:

• To review the impact of cold-pressing and microwave pre-treatment on rapeseed oil extraction yield.
• To assess the preservation of bioactive compounds in cold-pressed rapeseed oil.
• To explore the health benefits and diverse applications of cold-pressed rapeseed oil.

Main Methods:

• Review of scientific literature on cold-pressing techniques for rapeseed oil extraction.
• Analysis of studies investigating microwave pre-treatment effects on oil yield and quality.
• Compilation of data on the bioactive compound profiles of cold-pressed versus refined rapeseed oil.

Main Results:

• Cold-pressing preserves the fatty acid profile and bioactive compounds in rapeseed oil.
• High levels of phenolic compounds, tocopherols, phytosterols, and carotenoids are found in cold-pressed varieties.
• These compounds contribute to health benefits including improved lipid profiles, insulin sensitivity, and antioxidant activity.

Conclusions:

• Cold-pressed rapeseed oil is a high-quality edible oil with significant health benefits.
• The extraction methods reviewed influence the yield and nutritional value of the oil.
• Cold-pressed rapeseed oil has potential applications beyond edible uses, including animal feed, chemical, and fuel industries.