What’s The Difference Between –

1. Wood Cold Pressed Oil 2. Cold Pressed Oil 3. Refined Oil

People often get curious about what's the difference between Wood Cold-pressed oil, Cold pressed oil, and refined oil. Well…

IT’S ALL ABOUT THE OIL EXTRACTION METHODS THAT COME INTO PLAY. HEAT IS THE ONLY ELEMENT THAT DESTROYS VITAL NUTRIENTS IN THE OIL WHICH NEEDS TO BE PRESERVED. LET’S UNDERSTAND EACH OF THE 3 EXTRACTION METHODS BELOW AND KNOW WHY WOOD COLD PRESSED OIL IS THE OBVIOUS CHOICE.

Wood Cold Pressed Oils

In ancient times, edible oils were prepared using a traditional wooden mortar & pestle technique. It was driven by a farm animal that would circle around, driving the pestle to crush seeds or nuts, extracting precious oil. Nowadays, this process has evolved with a low-power motor replacing the animal while wooden mortar & pestle, the main component, remain unchanged. Oil extracted in this method is at room temperature. The result is pure, natural & fresh oil, brimming with minerals, nutrients, flavor & aroma from the seeds/nuts, without any added chemicals or preservatives. Wood-pressed oil retains the essence of its singular ingredient – the seed/nut.

It yields 14 to 50% of extractable oils depending on the seed/nut type at room temperature without heat generation. Wood Pressed Oil is more viscous, reducing oil usage by 20-30% as compared to refined oils. The remaining pulp, or 'Cake,' is utilized as animal feed after oil extraction.

Highlights
Eco-friendly
No waste
No pollution
No drain on the power consumption
100% pure
Unrefined
No chemicals used

Cold Press Oil

The extraction process of Cold Press Oil is done through modern stainless steel expeller machines. There are 2 types of expeller machines. Most industrial Expeller machines have a chamber where raw materials are generally roasted and in this process, additional heat is also generated by screw press.

In the other type of Expeller machine, known as "Expeller Cold Pressed" there is no chamber to heat the raw materials. Heat is generated on the raw materials by pressure from the screw press thereby heating the oil to 185–200 °F (85–93 °C).

Both types of Expeller oil extractions adversely affect the quality of the natural oil nutrients and even much of the aroma is lost due to the high pressure exerted on the raw materials and by default also heating up the oil.

In this method, 65 to 90% of the oils are extractable, as against 14-50% from Wood Cold Press.

Refined Oil

Refining oil prioritizes maximizing yield and profits, often overlooking the long-term impact on consumer health. The process involves over a dozen stages, using high heat above 400°F (205°C) and toxic chemicals that strip away essential nutrients. Check out the simple chart below specifying some of the refining process:

Step
Process
Description
01
Roasting
High-temperature roasting of oil seeds/nuts
2
Grinding
Grounding into paste at high temperature
3
Extraction
Use of Expeller machine under high pressure
4
Chemical Processing
Further processing the cake/pulp for the remaining oil with toxic chemicals.
5
Hexane Extraction
Using Hexane chemical to extract the remaining oil
6
Hexane Removal
Boiling to remove Hexane
7
Degumming
Removal of substances that degenerate oil
8
Neutralization
Removing free fatty acid using caustic soda
9
Bleaching
Eliminating color pigments
10
Deodorization
Removing the smell of chemicals, adding flavoring
11
Winterized/De-waxed
Removing wax in the oil to prevent solidification
12
Stabilization
Boiling oil to stabilize taste & remove bad smell of the chemical used.
13
Citric Acid Addition
Adding citric acid to inactivate trace metals


Reference to source of information:


https://lipidlibrary.aocs.org/chemistry/physics/frying-oils/oil-refining
https://en.wikipedia.org/wiki/Expeller_pressing
https://www.fao.org/3/al375e/al375e.pdf
https://www.ocl-journal.org/articles/ocl/pdf/2000/04/ocl200074p305.pdf
https://www.researchgate.net/publication/329993761_Cold_press_in_oil_extraction_A_review
https://www.andersonintl.com/debunking-the-debate-between-expeller-pressed-versus-cold-pressed-oil/
https://www.researchgate.net/publication/370130264_A_REVIEW_ON_WOOD_PRESSED_EDIBLE_OILS
https://en.wikipedia.org/wiki/Edible_oil_refining
https://www.interscience.in/imr/vol5/iss1/5/
http://renegadehealth.com/blog/2013/12/02/cooking-oils-how-theyre-extracted-and-refined-and-the-health-consequences