How Kimchi Is Made: From Fresh Cabbage to a Fermented Bottle

A bottle of kimchi can look simple.

Open the jar and you see cabbage, vegetables and seasoning.

But fermentation is where the interesting part happens.

It starts with fresh vegetables

Cabbage is one of the most recognisable ingredients in traditional kimchi.

The vegetables are cleaned, prepared and combined with salt and seasonings.

Depending on the recipe, ingredients such as garlic, ginger, chilli, radish and spring onion may also be used.

The exact recipe varies by region, family and style.

Salt has an important role

Salt isn't simply there for flavour.

It helps draw water from vegetables and creates conditions that influence which microorganisms thrive during fermentation.

This is one reason fermentation is more than simply leaving vegetables in a jar.

There is a process behind it.

Then comes fermentation

Microorganisms transform the food over time.

The flavour changes.

Fresh vegetables become more acidic and tangy. Aromas develop. Texture changes. The final product becomes very different from the raw ingredients.

Fermentation can also generate new compounds through microbial metabolism.

A fermented food is not just “old food.” It is food that has undergone a controlled biological transformation.

Why temperature matters

Fermentation is influenced by environmental conditions.

Temperature, ingredients, salt concentration, oxygen exposure, time and microbial communities can all influence the final result.

That is why making consistent fermented food at commercial scale requires much more than following a recipe.

From kitchen experiment to food manufacturing

This is where a small food brand has a very different challenge from someone making one jar at home.

A manufacturer has to think about:

• Ingredient sourcing

• Recipe consistency

• Batch-to-batch variation

• Hygiene

• Fermentation conditions

• Packaging

• Storage

• Labelling

• Food safety

• Distribution

Gut Friend's own story reflects this transition. The brand says its kimchi journey began with years of home experimentation before moving toward recipe, ingredient and process refinement for commercial production.

That journey is interesting because it shows something consumers rarely see.

A fermented product has a process behind it.