Fermentation in cosmetics: What does a fermented extract mean and why does it increase the effectiveness of active ingredients?

Back 06. 05. 2026
 

Fermentation in cosmetics helps make active ingredients accessible, improve the bioavailability of extracts and support modern skin care. Let’s look at the difference between a fermented and a non‑fermented extract, what hyperfermentation is and how to use these raw materials in cosmetic formulations.

Contents of the article

Fermentacia v kozmetike, suroviny

Fermentation is one of the most interesting directions in modern cosmetics. Although many people know it mainly from foods – yoghurt, kefir, kimchi or kombucha – its importance in cosmetic formulations is growing very quickly.

In cosmetics, fermentation is used for botanical extracts, active ingredients, hydrating complexes, components for sensitive skin and raw materials focused on supporting the skin barrier or the microbiome.

It is not just a marketing trend. With a well‑designed raw material, fermentation can actually influence how available the substance is to the skin, how well it integrates into the formulation and what cosmetic effect it can deliver.

Fermented extracts therefore have their place in serums, facial toners, essences, creams, masks and hair products – everywhere we want to work with active components for sensitive or stressed skin.

What fermentation is and why it is used in cosmetics

Fermentation is a biotechnological process in which microorganisms or enzymes convert the original raw material into a new, partially modified form. The aim is to make active substances accessible which in the plant are originally bound or more difficult to utilise.

In cosmetics, the most commonly used are lactic acid bacteria, yeasts or specific enzymes. They can break down more complex substances into smaller molecules, release bound active components and change the overall profile of the extract.

In botanical extracts, fermentation can influence the content of free amino acids, organic acids, polyphenols, sugars, peptides and minerals. Because of this, fermented raw materials are often associated with better bioavailability – that is, how well the skin can use the active ingredient.

Some active substances are present in plants in a bound form or as part of larger molecular complexes. The skin may not be able to make good use of them in their original form.

Fermentation can partly “unlock” these substances – larger structures are broken down into smaller, simpler and more soluble components. This does not mean that every fermented extract is automatically more effective than every non‑fermented extract. It does mean, however, that fermentation is a very useful way of increasing the functional potential of a raw material.

In short: Fermentation can turn the original raw material into a functionally more interesting cosmetic component – it releases bound substances, reduces molecule size and moves the raw material from the category “contains a botanical extract” into the category “contains a carefully processed active ingredient”.

Fermented vs. non‑fermented extract

The difference between a fermented and a non‑fermented extract is important especially in terms of composition, availability of the active substances and the overall character of the raw material.

Non‑fermented extract

Classic botanical extract obtained from the plant or one of its parts using a solvent – water, glycerine, alcohol, propanediol or their combination.

It contains the substances naturally present in the plant: polyphenols, flavonoids, tannins, minerals, organic acids, sugars, mucilages.

Suitable where we want to provide a classic botanical benefit – antioxidant, soothing, astringent, hydrating or toning. See also macerates and extracts in the range.

Fermented extract

The original raw material or extract undergoes a fermentation process. Microorganisms or enzymes change its composition – they cleave larger molecules, release bound substances and new metabolites are formed.

The result is an extract with a different profile – milder, better usable, functionally more interesting.

Suitable for modern formulations focused on hydration, comfort, sensitive skin, barrier support and the microbiome.

A non‑fermented extract delivers the plant’s natural substances. A fermented extract delivers these substances after biotechnological processing, which can improve their availability and cosmetic potential.

What effects fermented substances can have in cosmetics

Fermented raw materials are used above all where we want to support skin comfort, hydration, formulation mildness and better utilisation of active substances. The specific effect depends on the type of raw material, the microorganism used, the type of fermentation, the concentration and the overall composition of the product.

Better bioavailability

Fermentation breaks larger molecules down into smaller ones and releases substances bound in more complex structures. The extract has a more active and more accessible profile.

Milder character

Many fermented extracts have a gentle cosmetic profile and fit well into formulations for more sensitive or reactive skin.

Support for hydration

During fermentation, amino acids, sugars and organic acids are formed or released – substances with hydrating and emollient potential.

Antioxidant potential

Fermentation can influence the availability of polyphenolic and antioxidant substances. This is of interest in products for dull and tired skin.

Barrier and microbiome

Fermented, postbiotic and probiotic‑oriented raw materials fit into the modern concept of the skin barrier and the microbiome.

Thought‑through formulation

Fermented raw materials act as a modern technological element – the formula gains a more sophisticated character and communication story.

Types of fermentation used in cosmetics

Fermentation is not a single universal process. In cosmetics we encounter several types, depending on which microorganism or technological procedure is used.

Type Microorganism / tool What it brings Typical use
Lactobacillus fermentation Lactic acid bacteria (Lactobacillus) Bioferments for microbiome, hydration and skin comfort. Sensitive skin, toners, serums.
Yeast fermentation Yeasts (Saccharomyces) Ferments and lysates with amino acids, peptides, minerals and B vitamins. Skin vitality, improvement of overall appearance.
Enzymatic fermentation Targeted enzymes High process control, specific profile of the resulting substance. Plant proteins, polysaccharides, complex extracts.
Combined fermentation Several microorganisms or fermentation steps Wider profile of active substances (bioferments, multi‑step extracts). Complex active complexes for modern formulations.

What hyperfermentation is

Hyperfermentation is a more modern and more intensive type of fermentative processing. In practice it is a multi‑step, optimised or technologically enhanced process, the goal of which is to make active substances from the raw material significantly more accessible.

For hyperfermented extracts, higher bioavailability, better cosmetic performance, a milder profile and suitability for modern formulations are emphasised.

It is associated above all with Asian cosmetics, K‑beauty trends, essences, toners, hydrating serums and products for a sensitive or weakened skin barrier.

It is K‑beauty in particular that has shown that modern skin care does not have to be based only on strong exfoliating acids and retinoids – it can also be about hydration, layering, the microbiome, the barrier and cleverly processed botanical extracts.

Beware of marketing: The word “hyperfermented” on its own is not enough. The quality of the raw material always depends on the starting material, the exact technological process, preservation, recommended dosage and the quality of the documentation.

Probiotics, prebiotics, postbiotics and ferments

With fermented raw materials we encounter the terms probiotics, prebiotics and postbiotics. In cosmetics they are used more cautiously than in foods – live microorganisms in finished products are technologically demanding in terms of stability and safety.

Probiotics are live microorganisms. In cosmetics they are used less often – standard products must be microbiologically stable. Inactivated microorganisms or lysates are used more frequently.
Prebiotics are substances that support beneficial microorganisms. They are used in products aimed at skin balance, comfort and support of the natural microbiome.
Postbiotics are non‑living components or metabolites from microorganisms – fermentation products, cell fragments, lysates. They combine the benefit of fermentation with stability in the product.

Fermented raw materials in the Handymade.sk range

In the range of active ingredients from Handymade.sk there are several fermented or biofermented raw materials suitable for modern face, body and hair formulations.

Where fermented extracts fit

Facial toners and essences

An ideal category – light texture, high proportion of water phase, first active step after cleansing. Fermented components support hydration, comfort and a gentle effect without a heavy feel on the skin.

Hydrating serums

Serums make it possible to work with a higher concentration of actives. Fermented extracts combine well with glycerine, hyaluronic acid, panthenol, niacinamide and betaine.

Creams for sensitive and dry skin

In cream formulations they add a gentle active benefit. They are suitable for products that combine hydration, lipids, emollients and barrier‑oriented ingredients.

Masks and leave‑on products

Hydrating, soothing or brightening masks. In leave‑on products they have enough time to work on the skin and show their cosmetic potential.

Hair care

Some fermented raw materials – for example fermented rice water – are also interesting for hair care. Rinses, hair tonics, masks, products to support softness and shine.

Barrier care

Postbiotic and fermented ingredients fit into the modern concept of skin‑barrier‑friendly cosmetics. They support comfort and the skin’s natural balance without aggressive actives.

How to formulate with fermented extracts

When working with fermented extracts it is important to treat them as active raw materials. Monitor the recommended dosage, pH stability, temperature resistance, compatibility with the preservative system and the overall stability of the final product. Most fermented extracts are added in the cool‑down or final phase of the formulation, especially if they contain more sensitive bioactive substances.

Are fermented extracts always better? Not automatically. Fermentation is a useful technological tool, but not a guarantee. The result depends on the quality of the original raw material, the microorganism, fermentation conditions, preservation, concentration of active substances and the way they are used. A high‑quality non‑fermented extract can be an excellent raw material – a high‑quality fermented extract, however, can additionally provide better availability of active substances.

Frequently asked questions about fermentation in cosmetics

Practical questions from formulation practice – pH, manufacturing phases, preservation, compatibility with other actives and stability of the finished product.

What pH is suitable for formulations with fermented extracts?

Most fermented extracts are stable in the range of pH 4.5–6.5, which corresponds to the physiological pH of the skin. Always check the specific value in the technical documentation of the raw material – some bioferments are sensitive to an alkaline environment and may lose effectiveness at pH values above 7.

In which manufacturing phase do I add the fermented extract to the formula?

Most often in the cool‑down or final phase at a temperature below 40 °C. More sensitive bioferments can lose activity at higher temperatures, so they are not incorporated into the hot water or oil phase. You will find the specific instruction in the supplier’s TDS.

Which preservative system is suitable for fermented components?

Mildly acidic or pH‑neutral systems without an aggressive effect on bioactive molecules – for example combinations of pentylene glycol, ethylhexylglycerin or complex systems such as Geogard ECT. Compatibility is always confirmed by a microbiological challenge test.

Are fermented raw materials vegan and suitable for COSMOS or ECOCERT formulations?

It depends on the specific raw material. Many fermented botanical extracts are vegan and some have COSMOS or ECOCERT certification. You will find this information in the supplier’s specification – for products in the Handymade.sk range, certification is stated directly in the description.

Can I combine a fermented extract with vitamin C or retinol?

Yes, but with caution. Ascorbic acid requires a low pH (3–4), which may not be compatible with all ferments. Retinol is sensitive to light and oxidation. In practice, more stable derivatives are recommended – ascorbyl glucoside or retinyl palmitate – or physically separate products (morning vs. evening application).

How long is a fermented extract stable in the finished product?

With an appropriate preservative system and storage in a cool, dark place, usually 6–12 months from the date of manufacture. Check stability with a challenge test and by monitoring changes in colour, odour and viscosity. The period after opening (PAO) is typically 6 months.

Can fermented components cause skin irritation?

At standard concentrations, fermented raw materials are among the well‑tolerated components. For sensitive or atopic skin, always recommend a patch test to the customer – especially if the product contains several actives at once or stronger fragrances.

Summary

Fermentation in cosmetics combines the natural origin of raw materials with modern biotechnology. It helps improve the availability of certain active substances, change the profile of botanical extracts and create gentle, functional and well‑usable cosmetic components.

Fermented extracts are not a miracle or a universal answer to everything. They are, however, a very interesting tool for formulators who want to create more modern, more thought‑through and more effective cosmetics.

Create modern cosmetics at home

When creating a hydrating serum, facial toner, essence, cream for sensitive skin or hair care, fermented raw materials can be exactly the detail that gives the formula higher value.

See the active ingredients