What industrialisation removed from the plate, and what people are quietly returning to.
Most kitchens in the early 1900s had something fermenting in them. A crock of cabbage. A jar of pickles sitting in brine. Bread made from a starter passed between neighbours. Fermented foods weren't a category then - they were just how food was stored, preserved, and eaten. They were ordinary.
A century later, the same foods are sold as something special. Which raises a quiet question: what exactly happened in between?
What Are Fermented Foods?
Fermented foods are foods transformed by microorganisms such as bacteria, yeasts, or fungi. During fermentation, these microorganisms change the food's sugars and other components, producing compounds that affect flavour, texture, acidity, aroma, and preservation.
Traditional fermented foods include sauerkraut, kimchi, naturally fermented pickles, kefir, kombucha, sourdough, miso, and other foods made using microbial cultures or naturally occurring microorganisms. Fermentation can be spontaneous or controlled through the addition of a starter culture.
Not every food described as "pickled" or "cultured" is fermented, however. Some foods are preserved with vinegar or other processing methods without undergoing the same microbial fermentation process. That distinction becomes important when looking at how industrial food production changed traditional fermentation.
Why Did Fermented Foods Decline in Western Diets?
The 20th century didn't slowly phase out fermentation. It replaced the conditions that made fermentation necessary.
Refrigeration arrived in homes from the 1920s onward. Pasteurisation became standard across dairy and many packaged goods. Industrial canning scaled up. Vinegar replaced brine. Preservatives replaced time. Each of these developments solved a real problem - spoilage, safety, consistency - but they also removed the need for fermentation from everyday food production.
What followed was a steady erasure. Not of the foods themselves, but of the living process behind them. Pickles remained on shelves, but they were pickled in vinegar, not fermented in salt. Sauerkraut stayed available, but pasteurised and shelf-stable. The product looked the same. The biology was completely different.
A study published in Nutrients (2019) highlighted that the shift toward ultra-processed food patterns across Western populations coincided with measurable reductions in dietary microbial diversity. The researchers noted that traditional fermented foods had historically served as a consistent source of live microorganisms - something largely absent from the modern Western diet.
Fermented vs. Pickled Foods: What's the Difference?
Fermented and pickled foods can look similar, but the preservation process is different.
Fermented foods are produced through the activity of microorganisms. In vegetable fermentation, for example, bacteria can convert available sugars into acids, gradually changing the food's flavour, texture, and acidity.
Pickling can also involve fermentation, but many modern pickled foods are preserved directly with vinegar rather than through microbial fermentation. In that case, the acidity comes primarily from the added vinegar rather than from microorganisms producing acids during fermentation.
This distinction explains why two jars of pickles can look almost identical while being made through completely different processes.
What was actually lost
Fermented foods made through traditional methods are living. The microbes in naturally fermented sauerkraut, unpasteurised pickles, or raw kombucha are active - metabolising, producing acids, shaping flavour, and interacting with whatever environment they enter.
Pasteurisation ends that. It extends shelf life, standardises taste, and removes any unpredictability. It also removes the living component entirely.
What's often overlooked is that this wasn't a failure of industrial food science. It was a trade-off. Safety and scale came at a cost that wasn't fully understood at the time - and wasn't considered especially important. Gut health wasn't a priority in 1950s food policy. Shelf stability was.
If you're curious what the difference between live fermentation and pasteurised alternatives actually looks like in practice, Tabchilli's vegetable fermentation workshops walk through exactly this - from the brine to the jar to the taste.
The marketing layer that came later
By the late 20th century, fermented foods had largely left home kitchens. And when they returned, they often returned through a different door: wellness marketing.
Kombucha, kimchi, and kefir re-entered mainstream consciousness packaged as "functional foods" with health claims attached. Some of those claims were grounded. Many were stretched well beyond what the evidence supported.
This is where things get slightly complicated. The renewed interest in fermented foods is genuinely warranted - research into the gut microbiome has expanded significantly since the early 2010s, and scientists have become more specific about how dietary patterns affect gut composition. A landmark study published in Cell (2021) by Wastyk et al. found that a diet high in fermented foods increased microbiome diversity and reduced markers of immune activation over a ten-week period.
But the wellness industry picked up that research and ran with it far beyond what it actually said. The result: a lot of noise around fermented foods that made the topic feel like a trend rather than something with real, quiet depth.
Tabchilli's range of traditionally fermented foods - unpasteurised sauerkraut, kimchi, naturally fermented pickles - exists outside that noise. No health claims on the label. Just the actual product.
Why Are Fermented Foods Coming Back?
The return to fermented foods isn't happening in one way. Some people are buying products. Some are learning to make them. Both paths are valid, and both reflect the same underlying shift: a growing interest in where food comes from and what happens to it before it reaches a plate.
Research is part of the reason. The gut microbiome has become one of the most actively studied areas in nutrition science over the past decade. As findings from journals like Gut and Nature Medicine have filtered into public awareness, more people have started paying attention to what they eat in relation to digestion, not just calories.
But the return is also partly a reaction. Ultra-processed food consumption in Western countries has increased substantially since the 1980s. Some people are pushing back against that - not dramatically, not ideologically, but practically. They're looking for food that hasn't had everything interesting removed from it.
In many cases, fermented foods are the simplest version of that. Cabbage, salt, time. The ingredient list is short because the process does the work.
Whether that means starting at home with fermentation starters or exploring fermentation hands-on in a workshop, Tabchilli supports both - the making and the understanding.
Traditional Fermentation vs. Commercial Fermented Foods
Traditional fermentation usually relies on a living microbial culture and time to transform the food. The process can vary with temperature, salt concentration, ingredients, oxygen exposure, and fermentation length.
Commercial fermentation can use controlled cultures and tightly managed production conditions to achieve consistent results at scale. Additional processing may then be used to control shelf life, flavour, texture, or microbial content.
Neither approach is inherently better in every respect. Commercial production offers consistency and scalability, while traditional fermentation preserves a process in which microbial activity remains central to how the food develops its character.
Why Is Fermentation Becoming Popular Again?
The earlier wave of fermentation interest in the 2010s was largely trend-driven. This one feels quieter and more considered.
People are approaching it with more specific questions: what makes something genuinely fermented versus vinegar-preserved? Does pasteurisation change what a product does? How long should something ferment to develop the right profile?
Those are the questions of someone who wants to understand the process, not just buy the product.
What the 20th century removed wasn't just fermented foods from the kitchen. It removed familiarity with fermentation as a process - the intuition about timing, smell, texture, and change that used to be passed down practically. That knowledge gap is real, and it's part of what makes learning fermentation feel new again even though it's old.
The foods haven't changed. The understanding is being rebuilt.
If you'd like to start rebuilding that understanding practically - tasting, observing, and working with live fermentation in a real kitchen - Tabchilli's fermentation workshops are designed exactly for that.
Sources
- Zinöcker & Lindseth, Nutrients, 2018 - ultra-processed diets and disruption of traditional dietary patterns including fermented foods
- Wastyk et al., Cell, 2021 - high-fermented-food diet, microbiome diversity, and immune markers
- Sonnenburg & Bäckhed, Nature, 2016 - gut microbiota interactions with Western diet patterns
-
Lisko et al., Gut Microbes, 2017 - dietary fermented food consumption and microbial community shifts