Ingredient review
Galactomyces Soymilk Ferment Filtrate
INCI: GALACTOMYCES/SOYMILK FERMENT FILTRATE
A gentle, fermented ingredient that hydrates and supports skin texture, popular in Korean skincare essences.
In plain English
This ingredient is made by fermenting soymilk with a type of yeast called galactomyces. The fermentation process breaks down proteins and sugars into smaller, more skin-friendly components like amino acids, peptides, and vitamins. When applied to the skin, it helps attract and hold moisture, and may support a smoother, more even-looking complexion. It is lightweight and generally well-tolerated, even by sensitive skin types.
Review score
Safety, usefulness, and evidence
Strong fit for many routines
The evidence base is useful, but some claims depend heavily on the formula.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- biotech
- Evidence
- moderate
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Easy yes for most routines
Galactomyces Soymilk Ferment Filtrate is generally a lower-concern ingredient when the full formula suits your skin.
Plain-English read
Treat this as a practical screening step before you compare products that contain this ingredient.
- Step 1Start with the score, then check the irritation and clogging risk before judging Galactomyces Soymilk Ferment Filtrate.
- Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
- Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.
Score terms in plain English
Irritation risk
lowLess likely to sting, burn, or bother most users, though sensitive skin can still react.
Clogging risk
lowLess likely to feel heavy or contribute to clogged pores for most skin types.
Evidence level
moderateThere is useful support, but formula details and claim strength still matter.
What it is
A fermented filtrate produced by culturing Galactomyces yeast in soymilk, then filtering the liquid to collect the nutrient-rich broth.
How it works
The fermentation process creates smaller molecules that can more easily penetrate the skin's surface. These molecules act as humectants, drawing moisture into the skin, and provide amino acids and peptides that support the skin's natural barrier function.
Pros
Gentle Hydration
Provides moisture without heavy oils or thickeners, making it suitable for layering in a routine.
Supports Skin Texture
The amino acids and peptides from fermentation may help support a smoother, more even skin surface over consistent use.
Cons and cautions
Potential Fungal Acne Trigger
Fermented ingredients can feed Malassezia yeast, so those prone to fungal acne should patch test carefully.
Variable Quality
The benefits depend heavily on the fermentation process and concentration used by the brand, so not all products are equal.
Best for
- People with dry or dehydrated skin looking for gentle hydration
- Those interested in fermented skincare for a brighter, smoother complexion
Use caution if
- Individuals with a known allergy to soy or yeast should patch test first
Usage tips
Safety summary
Galactomyces/Soymilk Ferment Filtrate is considered safe for topical use with a low irritation and comedogenic risk. Patch testing is recommended for those with soy or yeast allergies.
Research notes
Research on galactomyces ferment filtrate suggests it can improve skin hydration and barrier function, though most studies are small or industry-funded. The fermentation process is well-documented to produce beneficial amino acids and peptides.
Common label clues
- Typical concentration
- Typically 90-97% in essences or serums
- Regulatory status
- Generally recognized as safe for cosmetic use in the US and EU, with no specific restrictions beyond standard cosmetic ingredient regulations.
- Common uses
- Serums, Essences, Toners, Moisturizers
- Environmental note
- Soymilk is a plant-based byproduct, making this a more sustainable option compared to animal-derived ferment filtrates.
Good to know
- This ingredient is a staple in many Korean beauty essences and is often used at very high concentrations (90%+).
- It has a subtle, earthy scent from the fermentation process, which is normal and not a sign of spoilage.
Common questions
What is Galactomyces Soymilk Ferment Filtrate in beauty products?
This ingredient is made by fermenting soymilk with a type of yeast called galactomyces. The fermentation process breaks down proteins and sugars into smaller, more skin-friendly components like amino acids, peptides, and vitamins. When applied to the skin, it helps attract and hold moisture, and may support a smoother, more even-looking complexion. It is lightweight and generally well-tolerated, even by sensitive skin types.
What does Galactomyces Soymilk Ferment Filtrate do in a beauty product?
The fermentation process creates smaller molecules that can more easily penetrate the skin's surface. These molecules act as humectants, drawing moisture into the skin, and provide amino acids and peptides that support the skin's natural barrier function.
Is Galactomyces Soymilk Ferment Filtrate safe for most people?
Galactomyces/Soymilk Ferment Filtrate is considered safe for topical use with a low irritation and comedogenic risk. Patch testing is recommended for those with soy or yeast allergies.
Who should be careful with Galactomyces Soymilk Ferment Filtrate?
Individuals with a known allergy to soy or yeast should patch test first
Research sources
Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.