Walk down any oil aisle in India today and you'll see "cold-pressed" and "kachi ghani" printed proudly on some bottles and absent from others often at very different price points. The difference isn't just marketing. Cold-pressing and refining are genuinely different industrial processes that change the oil's composition, and each has real trade-offs worth understanding before you decide what to keep in your kitchen.
What actually happens during refining
The four-step industrial process
Refining typically involves degumming (removing phospholipids), neutralization (removing free fatty acids with alkali), bleaching (removing pigments using bleaching earth), and deodorization (high-temperature steam distillation, often above 200°C, to remove odour compounds). Each step is designed to produce a neutral-tasting, long-shelf-life, high-smoke-point oil suitable for mass retail.
What cold-pressing does instead
Cold-pressing mechanically crushes the seed or nut at low temperature (generally below 40–50°C) with no chemical solvents and no high-heat deodorization step. This retains more of the oil's natural colour, aroma, and some heat-sensitive compounds, but also means any natural impurities or flavour compounds from the raw seed carry through more directly.
What the science says about refining contaminants
The EFSA findings on 3-MCPD and glycidyl esters
In 2016, the European Food Safety Authority published a scientific opinion identifying 3-monochloropropane-1,2-diol (3-MCPD) and glycidyl esters as process contaminants that can form specifically during the high-heat deodorization step of oil refining. Glycidyl esters are considered by EFSA to be of particular concern because glycidol (released after digestion) is classified as genotoxic and carcinogenic in animal studies. This is a real, citable, regulatory-body finding not a marketing claim and it is specific to the refining process, not to cold-pressed oil.
What this does and doesn't mean for you
This does not mean refined oil sold in India is unsafe to use regulatory bodies continue to monitor and set limits for these contaminants, and refined oils remain widely approved for sale. What it does mean is that "cold-pressed avoids a specific, named category of refining-related contaminant" is an accurate, evidence-backed statement, distinct from vaguer claims like "cold-pressed is healthier" without specifics.
The trade-offs that actually affect your cooking
Smoke point
Refined oils generally have a higher smoke point (often 220–230°C+) than their cold-pressed counterparts, making them more forgiving for deep-frying and high-heat searing without breaking down or smoking. Cold-pressed oils, retaining more natural compounds, can have somewhat lower smoke points and are often better suited to lower-heat sautéing, tempering (tadka), or as a finishing/raw addition.
Shelf life and storage
Refined oil's neutral composition and lack of natural impurities generally give it a longer, more stable shelf life at room temperature. Cold-pressed oil, retaining more natural compounds, can be more prone to oxidation over time and benefits from cooler, dark storage and being used within a shorter window after opening.
Cost
Cold-pressing yields less oil per kilogram of raw material and is more labour- and time-intensive than industrial refining, which is why genuine cold-pressed oils typically cost 30–80% more than mass-market refined oils of similar volume this is a legitimate cost difference in production, not pure markup.
Cold-pressed vs refined oil side by side
|
Factor |
Cold-pressed (kachi ghani) |
Refined |
|
Extraction method |
Mechanical, low temperature, no solvents |
Chemical/high-heat: degumming, neutralization, bleaching, deodorization |
|
Flavour & colour |
Retains natural colour and aroma |
Neutral, lighter colour and taste |
|
Smoke point |
Generally lower |
Generally higher (better for deep-frying) |
|
Refining contaminants (3-MCPD, glycidyl esters) |
Not formed by this process |
Can form during high-heat deodorization (EFSA, 2016) |
|
Shelf life |
Shorter, needs cool/dark storage |
Longer, more stable at room temperature |
|
Typical price |
Higher |
Lower |
|
Best for |
Low-heat cooking, tempering, finishing |
High-heat frying, everyday bulk cooking |
In simple terms
In simple terms: cold-pressed oil skips the high-heat refining step that can form specific documented contaminants, but costs more and doesn't handle deep-frying heat as well. Refined oil is more practical and shelf-stable for everyday high-heat cooking. Most Indian kitchens benefit from using both, matched to the right kind of cooking.
How to split your oil use sensibly
A practical way to use both categories rather than treating it as one-or-the-other.
1. Use cold-pressed oil for tempering (tadka), light sautéing, salad dressings, and finishing.
2. Reserve refined oil (or a high-smoke-point option) for deep-frying and high-heat searing.
3. Store cold-pressed oil in a cool, dark place and use it within 2–3 months of opening for best flavour.
4. Check the label for "cold-pressed" or "kachi ghani" wording if that distinction matters to you don't assume based on price or bottle design alone.
5. Rotate oils occasionally (mustard, groundnut, sesame, coconut) rather than relying on a single oil for every dish.
Common mistakes to avoid
• Using cold-pressed oil for deep-frying at high temperatures, where it's more likely to smoke and degrade.
• Assuming "cold-pressed" on the label alone guarantees quality without checking colour, smell, and price sense.
• Storing cold-pressed oil near a stove or in direct sunlight, which speeds up oxidation.
• Believing refined oil is "unsafe" outright it is regulated and widely approved; the distinction is about specific compounds and degree of processing, not safety versus danger.
• Buying a large volume of cold-pressed oil that won't be used before it degrades in flavour.
• Ignoring smoke point entirely and using any oil for any cooking method regardless of heat.
How Prakreti fits into your everyday routine
Prakreti's cold-pressed range mustard, groundnut, black sesame, and white sesame oils is extracted mechanically without chemical solvents or high-heat deodorization, sourced through direct farmer partnerships. These are positioned for the lower-heat, everyday-cooking and tempering use described above, not marketed as a universal replacement for high-heat frying oil.
• Cold Pressed Mustard Oil (₹500) — https://prakreti.com/products/cold-pressed-mustard-oil
• Cold Pressed Groundnut Oil (₹550) — https://prakreti.com/products/cold-pressed-groundnut-oil
• Cold Pressed Black Sesame Oil (₹650) — https://prakreti.com/products/cold-pressed-black-sesame-oil
• Cold Pressed White Sesame Oil (₹680) — https://prakreti.com/products/cold-pressed-white-sesame-oil
When to speak to a healthcare professional
Speak to a registered dietitian if you're managing cholesterol, triglycerides, or heart-health risk and want personalised guidance on oil choice and quantity; consult a doctor if you've had a reaction to a specific oil (nut-based oils in particular, if there's any allergy history); and check with a paediatrician before introducing a new cooking oil into a young child's diet in significant quantity.
Related reads
FAQs
1. Is cold-pressed oil actually better for health than refined oil?
Cold-pressed oil avoids the specific process contaminants (3-MCPD, glycidyl esters) that EFSA identified as forming during high-heat refining, which is a real, documented difference. But "better" also depends on smoke point suitability for your cooking method and overall diet it is not a blanket health claim, and refined oils remain regulated as safe for sale.
2. Can I use cold-pressed oil for deep-frying?
It's generally not recommended for extended deep-frying, since cold-pressed oils tend to have lower smoke points and can degrade or smoke at high sustained heat. They're better suited to tempering, sautéing, and finishing dishes.
3. Why is cold-pressed oil so much more expensive than refined oil?
Cold-pressing yields less oil per kilogram of seed and is more time- and labour-intensive than industrial refining, which processes seed at scale with higher yield. This is a genuine production cost difference, not simply a marketing markup.
4. How long does cold-pressed oil last once opened?
Typically shorter than refined oil around 2–3 months for best flavour and quality when stored in a cool, dark place, versus 6–12 months commonly claimed for refined oils. Always check the specific product's guidance and use your senses (smell, taste) to judge freshness.
5. What are 3-MCPD and glycidyl esters, in simple terms?
They are process contaminants that can form during the high-heat deodorization step of industrial oil refining, identified in a 2016 EFSA scientific opinion. Glycidyl esters are of particular concern because they release glycidol after digestion, which has shown genotoxic and carcinogenic effects in animal studies. Regulatory bodies continue to monitor and set limits on these compounds in refined oils.
6. Should I switch entirely to cold-pressed oil?
Not necessarily a practical approach many nutrition-conscious households use is cold-pressed oil for lower-heat cooking and finishing, and a refined or high-smoke-point oil for deep-frying, rather than trying to use one oil for everything.