There is a smell that announces itself before the cooking even begins. Sharp, almost aggressive, with warmth underneath. Can you smell it already? If you grew up in a Bengali household or spent time in a Punjabi kitchen, you already know exactly what that smell is.
It is getting attention all over.
For generations, it was the default cooking oil across large parts of India. Not as a special ingredient or a health trend, but just existing that one oil as it should be, doing things that it is supposed to do. Bringing things together and making some of the most flavourful dishes this country has ever produced.
Then something changed.
In today’s episode, we will discuss that story. What changed? Why it changed, and why mustard oil never really left, in spite of all of it. Let’s open some history books.
Why Did Mustard Oil Disappear From Some Kitchens?
The story begins with erucic acid.
In the 1950s, research revealed that the sharp flavours and intense aromas from mustard oil came partly from compounds like erucic acid and glucosinolates. Early research suggested that high concentrations of erucic acid could cause heart conditions in mice. That was enough for regulators to act.
The US Food and Drug Administration banned mustard oil for edible use because of its erucic acid content, requiring that any mustard oil sold in the US be labelled for external use only. The European Union and Canada followed with similar restrictions.
The ban spread a narrative. And narratives, once loose, travel further than the science behind them.
What the ban did not fully account for was that the cardiovascular effects of erucic acid had only been demonstrated in animals, and had not been shown in humans, particularly at the relatively low doses that most diets include.
India, where mustard oil had been a dietary staple for centuries, never adopted the ban. The research simply did not support restricting it for a population that had consumed it across generations without the health consequences seen in laboratory animals.
However, the damage to perception was already done. Refined vegetable oils, newer and heavily marketed, moved in to fill the space that doubt had created. In urban Indian kitchens, particularly, mustard oil quietly lost ground.
Why Indian Kitchens Never Really Let It Go
While the debate around mustard oil played out in regulatory offices and research papers, something simpler was happening in Indian kitchens. People kept cooking with it.
Mustard oil is not a neutral cooking medium. It brings something to every dish it touches, a sharpness that mellows with heat, a depth that refined oils cannot replicate. And across large parts of India, entire culinary traditions were built around exactly that character.
In Bengal, mustard oil is the foundation of the kitchen. Shorshe ilish, hilsa fish cooked in a mustard gravy, is one of the most beloved dishes in Bengali cuisine.
In Punjab, sarson da saag with makki di roti is comfort food built around mustard. The oil carries the dish in a way that nothing else quite does. In Bihar, litti chokha is considered incomplete without mustard oil. In Rajasthan, it goes into pickles and spicy curries that have been made the same way for generations.
These are the communities that held onto mustard oil because the food required it. Because substituting a refined, neutral oil into a shorshe ilish or a ker sangri does not produce the same dish.
The ban and the narrative around it largely affected urban kitchens, places where packaged refined oils were more accessible and where marketing had more reach. In the regions where mustard oil had always been the default, the conversation about whether it was safe or not barely happened because the dishes remained flavourful.
What Is Wood-Pressed Mustard Oil And How Is It Made?
The name gives it away if you know what to look for. Kachi Ghani. In Hindi, it translates roughly to raw crusher or raw pressing. The word kachi means raw or unprocessed. Ghani refers to the traditional press used to extract oil from seeds.
Kachi Ghani mustard oil is extracted at low temperatures using a wooden or slow-speed press, without heat or chemicals. The goal is to keep the natural aroma, sharp taste, and nutrients intact.
Think of it as the Indian equivalent of extra virgin olive oil. Both are the output of the first pressing of the seeds, so they carry the best characteristics of the oil.
Refined mustard oil goes through a very different process. The seeds are subjected to high heat and chemical solvents to extract maximum yield quickly. What comes out is more oil, faster, but at higher temperatures, the oil changes in texture, taste, colour, and nutritional properties. Many nutrients are destroyed when oil is extracted through hot pressing or solvent extraction.
The wood pressed process is slower. It produces less oil per batch. It costs more to make. But it preserves the natural pungency, the deep golden colour, and the aroma that hits you before the oil even touches the pan.
What Are The Health Benefits Of Wood-Pressed Mustard Oil?
The benefits of mustard oil are real, but they are also an area where overclaiming is common. Here is what the research actually supports, stated honestly.
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Fat Profile: Mustard oil has a naturally balanced ratio of omega-3 and omega-6 fatty acids, with low saturated fat content. This natural balance is one of mustard oil's most clinically significant nutritional advantages.
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Allyl Isothiocyanate: Allyl isothiocyanate is a naturally occurring antimicrobial compound that demonstrates significant inhibitory activity against pathogens, including E. coli, Salmonella, and Staphylococcus aureus. It is also why mustard oil has been used in pickling for generations.
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Anti-inflammatory: Mustard oil contains omega-3 fatty acids, which research highlights can help reduce inflammation. Allyl isothiocyanate may also possess anti-inflammatory properties, though current evidence in humans remains limited.
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Cardiovascular Considerations: Studies involving mustard oil consumption noted reductions in certain heart-related conditions, including irregular heartbeat and chest pain.
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Skin And Hair Use: Generations of Indian households used mustard oil on skin and hair long before anyone ran a clinical trial on it. The antimicrobial and circulatory properties that work internally also explain why it has always worked externally.
Wood-pressed mustard oil is not a cure for specific things, actually. It is a traditionally used, minimally processed oil with a genuinely interesting nutritional profile. Used regularly, in a considered diet, it holds up well against most of the other modern oils.
What To Look For When Buying Wood-Pressed Mustard Oil?
As wood pressed and kachi ghani mustard oil become more visible on shelves, so do products that borrow the language without the process. A few things worth checking before you buy.
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Kachi Ghani/Wood Pressed: This should be on the label without ambiguity. The extraction method should be specifically mentioned.
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The Colour: Genuine wood pressed mustard oil is deep golden to amber, sometimes with a slight reddish tone.
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Smell: Real kachi ghani mustard oil smells sharply of mustard. Pungent, distinctive, unmistakable.
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Single Ingredient: The ingredient list should say one thing. Mustard oil. No blending with other oils, no additives, no preservatives.
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Source Transparency: Mustard is cultivated across Rajasthan, Punjab, Bihar, and Uttar Pradesh. Brands that mention where their seeds come from are generally more careful about everything else in the process, too.
Final Thoughts
Mustard oil never needed to be rediscovered. It was always there, in the kitchens that never let go of it, in the pickles that have been made the same way for generations, in the tadkas that smell like home.
What changed was not the oil. It was the narrative around it. A story built more around trade interests than evidence quietly pushed it off shelves in urban kitchens that were already being pulled toward newer, more heavily marketed alternatives.
Wood-pressed mustard oil is a return to something that was working anyway. The process is slower, the yield is smaller, and the oil that comes out is sharper, richer, and more honest than anything else in the world.
A Note From Gir Organic
At Gir Organic, we believe an oil should taste like what it came from. Our wood-pressed black mustard oil is extracted using the traditional kachi ghani process, slow, cool, and without chemical solvents. What you get is oil that still carries the full character of the mustard seed.
If you have been thinking about making the switch, try ours and taste what the difference actually feels like.