"Cold pressed is better" is one of those claims you see printed on nearly every premium oil bottle, but it is worth asking what that actually means at a nutrient level, and whether it is true for every use case. The honest answer is that why cold pressed oil is better comes down to specific, measurable differences in how the oil is extracted, and those differences matter more for some purposes than others.
What Happens During Refining That Does Not Happen in Cold Pressing
Most refined oil starts with a chemical solvent, commonly hexane, used to pull the maximum amount of oil out of the seed or fruit. The crude oil that results is then put through a multi-step process: degumming to remove phospholipids, neutralising to remove free fatty acids, bleaching to strip colour, and deodorising at high temperatures to remove strong smells. Each of these steps uses either heat, chemicals, or both, and together they leave an oil that is lighter in flavour, more shelf stable, and more neutral, but also stripped of many of the compounds that gave the original seed its character.
Cold pressing skips all of that. The oil is extracted through mechanical pressure alone, with temperature kept under a set threshold and no solvents added, so whatever was naturally present in the seed largely stays in the final oil.
The Nutrients Cold Pressing Tends to Preserve
Vitamin E and natural antioxidants
Vitamin E and various polyphenol antioxidants are heat sensitive and can degrade significantly during high temperature refining. Because cold pressing avoids that heat exposure, more of these compounds typically remain intact in the finished oil.
Natural flavour compounds and phytosterols
The aroma and taste of an unrefined oil, whether it is the pungency of mustard oil or the sweetness of coconut oil, comes from volatile compounds that are largely destroyed during deodorising. Cold pressed oils also tend to retain more naturally occurring phytosterols, plant compounds associated with the seed's original composition.
- Vitamin E: better retained without high heat processing
- Polyphenols and antioxidants: largely preserved due to the absence of chemical bleaching
- Natural aroma and flavour: intact because there is no high heat deodorising step
- No solvent residue: nothing is added that later needs to be stripped back out
Where Cold Pressed Oil Is Not Automatically "Better"
It would be misleading to present this as a one sided story. Refined oils generally have a higher smoke point, which makes them more practical for sustained deep frying at high temperatures, and their longer shelf life and neutral flavour suit certain recipes better. Cold pressed oils typically have a lower smoke point, a shorter shelf life once opened, and a stronger, more distinct flavour that is not always what a dish calls for. "Better" really depends on what you are optimising for, nutrient retention and minimal processing, or heat tolerance and cost per litre.
What This Means for Everyday Cooking
A practical approach is to use cold pressed oil where its flavour and nutrient profile can actually be tasted and felt, such as light sauteing, tempering, salad dressings, or finishing a dish, and reserve a more heat stable refined oil for high temperature deep frying if that is a regular part of your cooking. Many households also rotate oils by purpose, keeping a cold pressed mustard oil for tempering and a cold pressed coconut oil for lighter sauteing or baking, rather than relying on a single bottle for every dish.
Rulife's cold pressed oils, including mustard and coconut, are extracted mechanically without added heat or solvents, and the current range is available at Rulife's oil collection.
FAQs
1. Is cold pressed oil actually healthier than refined oil?
Cold pressed oil generally retains more heat sensitive nutrients like vitamin E and natural antioxidants because it avoids high heat and chemical processing. Whether that translates to a meaningfully healthier outcome depends on your overall diet, not any single oil choice.
2. Does cold pressed oil have a lower smoke point than refined oil?
Yes, in most cases. Refined oils are processed to withstand higher temperatures, which is why they are more commonly used for deep frying, while cold pressed oils suit lower and medium heat cooking better.
3. How long does cold pressed oil last once opened?
Cold pressed oil generally has a shorter shelf life than refined oil, often a few months once opened, and should be stored in a cool, dark place in a tightly sealed container to slow oxidation.
4. Can I deep fry with cold pressed oil?
You can, but its lower smoke point means it is more prone to breaking down and smoking at high, sustained frying temperatures compared with a refined oil, so it is better suited to occasional or lower temperature frying.
5. Does cold pressing remove all impurities from the oil?
No. Cold pressed oil is filtered mechanically but not chemically refined, so it retains natural sediment and compounds that a refined oil would have stripped out. This is expected and part of why the oil has more flavour and colour.
6. Is cold pressed oil worth the extra cost?
That depends on your priorities. If minimal processing, natural flavour, and nutrient retention matter to you, the extra cost reflects genuine differences in extraction. If you mainly need a heat stable, budget friendly oil for high volume frying, a refined oil may be the more practical choice.
Conclusion
Why cold pressed oil is better comes down to what is left out of the process: no high heat, no chemical solvents, and no bleaching or deodorising, which together preserve more of the oil's natural vitamin E, antioxidants, and flavour compounds. That said, refined oil still has a legitimate place in the kitchen for high heat cooking and longer shelf life. The most useful approach is matching the oil to the task rather than assuming one type is universally superior.
