Ingredient review
Fermented Barley & Yeast Extract
INCI: HYDROLYZED ASPERGILLUS/SACCHAROMYCES/HORDEUM VULGARE FERMENT EXTRACT FILTRATE
A gentle, fermented ingredient that helps hydrate and condition skin without irritation, though its benefits come from a mix of compounds rather than a single active.
In plain English
This ingredient is made by fermenting barley with two types of microbes (Aspergillus and Saccharomyces, which are related to baker's yeast). After fermentation, the liquid is filtered and the leftover solids are removed. What remains is a broth rich in amino acids, peptides, sugars, and other small molecules that can help moisturize and soften the skin. Think of it like a gentle, watery nutrient soup for your skin.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
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
Useful, but context matters
Fermented Barley & Yeast Extract 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 Fermented Barley & Yeast Extract.
- 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 derived from barley (Hordeum vulgare) and two microorganisms: Aspergillus (a mold used in food fermentation) and Saccharomyces (a yeast). The fermentation process breaks down larger proteins and carbohydrates into smaller, more easily absorbed components.
How it works
When applied to the skin, the small peptides and amino acids in this filtrate can help attract and hold moisture (humectant effect). The sugars and other metabolites may also support the skin's natural barrier by providing building blocks for skin cells. It works gently, without harsh chemicals, to improve skin hydration and texture over time.
Pros
Gentle hydration
Provides moisture without the sticky or heavy feel of some humectants, making it suitable for most skin types.
Barrier support
The amino acids and peptides from fermentation can help reinforce the skin's natural barrier, improving resilience over time.
Cons and cautions
Variable potency
Because it's a complex mixture, the exact benefits depend heavily on the specific fermentation process and concentration used in a product.
Not a targeted active
It won't deliver dramatic results like a high-concentration vitamin C or retinol; it's more of a supportive, conditioning ingredient.
Best for
- People with dry or dehydrated skin looking for a gentle humectant
- Those who enjoy fermented skincare ingredients for their nutrient-rich profile
Use caution if
- Individuals with a known allergy to barley or yeast should patch-test first
Usage tips
Safety summary
Considered safe for topical use in cosmetics. The fermentation process is controlled to ensure no harmful byproducts remain. Allergic reactions are rare but possible in individuals sensitive to barley or yeast.
Research notes
Research on fermented plant extracts generally supports their ability to provide amino acids, peptides, and antioxidants that benefit skin hydration and barrier function. However, specific clinical studies on this exact ingredient are limited; most evidence comes from broader studies on fermented ingredients.
Common label clues
- Typical concentration
- 1–10% in leave-on products
- Regulatory status
- Approved for use in cosmetics globally; no specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Serums, Moisturizers, Essences, Toner
- Environmental note
- Barley is a widely grown crop with relatively low environmental impact; fermentation is a natural, low-energy process.
Good to know
- Fermented ingredients like this are often found in Korean and Japanese skincare routines for their gentle, nourishing properties.
- The filtrate is typically clear or slightly amber and has a mild, earthy scent from the fermentation process.
Common questions
What is Fermented Barley & Yeast Extract in beauty products?
This ingredient is made by fermenting barley with two types of microbes (Aspergillus and Saccharomyces, which are related to baker's yeast). After fermentation, the liquid is filtered and the leftover solids are removed. What remains is a broth rich in amino acids, peptides, sugars, and other small molecules that can help moisturize and soften the skin. Think of it like a gentle, watery nutrient soup for your skin.
What does Fermented Barley & Yeast Extract do in a beauty product?
When applied to the skin, the small peptides and amino acids in this filtrate can help attract and hold moisture (humectant effect). The sugars and other metabolites may also support the skin's natural barrier by providing building blocks for skin cells. It works gently, without harsh chemicals, to improve skin hydration and texture over time.
Is Fermented Barley & Yeast Extract safe for most people?
Considered safe for topical use in cosmetics. The fermentation process is controlled to ensure no harmful byproducts remain. Allergic reactions are rare but possible in individuals sensitive to barley or yeast.
Who should be careful with Fermented Barley & Yeast Extract?
Individuals with a known allergy to barley 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.