Ingredient review
Leuconostoc/Grape Juice Ferment Filtrate
INCI: LEUCONOSTOC/GRAPE JUICE FERMENT FILTRATE
A gentle fermented ingredient that exfoliates and provides antioxidant benefits without the harshness of traditional acids.
In plain English
This ingredient is made by fermenting grape juice with a friendly bacteria called Leuconostoc. The fermentation process creates natural acids and antioxidants that help gently remove dead skin cells and protect the skin from environmental damage. It's like a mild, natural version of chemical exfoliants such as glycolic acid, but much less likely to cause irritation.
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
Leuconostoc/Grape Juice 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 Leuconostoc/Grape Juice 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
Leuconostoc/Grape Juice Ferment Filtrate is the liquid obtained after fermenting grape juice with Leuconostoc bacteria. The fermentation produces lactic acid, gluconic acid, and various antioxidants, including resveratrol and flavonoids from the grapes.
How it works
When applied to the skin, the natural acids in the ferment gently dissolve the bonds between dead skin cells, encouraging them to shed. This reveals smoother, brighter skin underneath. The antioxidants help neutralize free radicals from UV and pollution, reducing oxidative stress. The ferment also contains natural sugars and amino acids that help hydrate and support the skin barrier.
Pros
Gentle exfoliation
Unlike stronger AHAs like glycolic acid, this ferment exfoliates very mildly, making it suitable for sensitive or dry skin types that cannot tolerate traditional acids.
Antioxidant boost
The grape-derived antioxidants help protect skin from daily environmental stressors, potentially reducing signs of premature aging.
Cons and cautions
Variable potency
The concentration of active acids and antioxidants depends on the fermentation process, so results may vary between products and brands.
Possible mild irritation
Although generally gentle, some individuals with extremely reactive skin may experience slight tingling or redness, especially at higher concentrations.
Best for
- People with dry or sensitive skin who want gentle exfoliation
- Anyone looking for antioxidant benefits in a mild, non-irritating form
Use caution if
- Those with a known allergy to grapes or fermented ingredients
Usage tips
Safety summary
Leuconostoc/Grape Juice Ferment Filtrate is considered safe for cosmetic use. It has a low irritation and comedogenic risk, making it suitable for most skin types. As with any fermented ingredient, patch testing is recommended for those with sensitive skin or allergies to grapes.
Research notes
Research on Leuconostoc/Grape Juice Ferment Filtrate is limited but growing. Studies on similar fermented grape extracts show antioxidant and mild exfoliating properties. The lactic acid produced is well-documented for gentle exfoliation. More specific clinical trials on this exact ingredient are needed to confirm long-term benefits.
Common label clues
- Typical concentration
- 2–10% in leave-on products; up to 20% in rinse-off products
- Regulatory status
- Approved as a cosmetic ingredient in the EU, US, and other major markets. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Serums, Toners, Essences, Masks
- Environmental note
- Grape juice is a byproduct of the wine industry, making this ingredient a sustainable upcycling choice. The fermentation process is generally low-energy and eco-friendly.
Good to know
- This ingredient is often found in K-beauty products, especially essences and toners.
- The fermentation process can also produce natural humectants that help hydrate the skin.
Common questions
What is Leuconostoc/Grape Juice Ferment Filtrate in beauty products?
This ingredient is made by fermenting grape juice with a friendly bacteria called Leuconostoc. The fermentation process creates natural acids and antioxidants that help gently remove dead skin cells and protect the skin from environmental damage. It's like a mild, natural version of chemical exfoliants such as glycolic acid, but much less likely to cause irritation.
What does Leuconostoc/Grape Juice Ferment Filtrate do in a beauty product?
When applied to the skin, the natural acids in the ferment gently dissolve the bonds between dead skin cells, encouraging them to shed. This reveals smoother, brighter skin underneath. The antioxidants help neutralize free radicals from UV and pollution, reducing oxidative stress. The ferment also contains natural sugars and amino acids that help hydrate and support the skin barrier.
Is Leuconostoc/Grape Juice Ferment Filtrate safe for most people?
Leuconostoc/Grape Juice Ferment Filtrate is considered safe for cosmetic use. It has a low irritation and comedogenic risk, making it suitable for most skin types. As with any fermented ingredient, patch testing is recommended for those with sensitive skin or allergies to grapes.
Who should be careful with Leuconostoc/Grape Juice Ferment Filtrate?
Those with a known allergy to grapes or fermented ingredients
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.