Ingredient review
Ozonized Yeast Ferment Filtrate
INCI: Ozonized Saccharomyces Ferment Lysate Filtrate
A novel fermented yeast ingredient with ozonation that may support skin antioxidant defenses, but human research is still limited.
In plain English
This ingredient is made by first fermenting yeast (Saccharomyces) to create a nutrient-rich liquid, then treating it with ozone gas. The idea is that ozone adds extra oxygen compounds that can help protect skin from environmental damage. It's a relatively new cosmetic ingredient, so while early lab studies look promising, we don't yet have strong human studies to confirm how well it works on skin.
Review score
Safety, usefulness, and evidence
Potentially useful with some tradeoffs
The evidence base is still emerging, so marketing claims deserve extra caution.
Risk flags are low for most users, though the finished product can still irritate.
- Source
- biotech
- Evidence
- emerging
- Irritation
- low
- Clogging risk
- low
Quick decision guide
Useful, but context matters
Ozonized Yeast 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 Ozonized Yeast 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
emergingThe ingredient may be promising, but claims should be treated more cautiously.
What it is
A cosmetic ingredient produced by fermenting Saccharomyces yeast, breaking open the yeast cells (lysate), filtering the liquid, and then exposing it to ozone gas. This process creates a complex mixture of peptides, amino acids, vitamins, and ozonides.
How it works
The yeast ferment provides skin-conditioning nutrients like amino acids and B vitamins. The ozonation step adds ozonides—compounds that may have antioxidant and antimicrobial properties. In theory, these ozonides can neutralize free radicals and support skin barrier function, but the exact mechanism in human skin is not yet fully understood.
Pros
Innovative antioxidant approach
Combines the skin-conditioning benefits of yeast ferment with ozone's potential to boost antioxidant activity, offering a novel way to protect skin.
Generally well-tolerated
Early reports and formulation data suggest low irritation and comedogenic risk, making it suitable for sensitive skin types.
Cons and cautions
Limited human evidence
Most research is lab-based or theoretical. Without robust human trials, it's hard to know how much real-world benefit this ingredient provides.
Variable quality
Ozonization is a specialized process; different manufacturers may produce inconsistent results, affecting the ingredient's stability and efficacy in finished products.
Best for
- People interested in innovative, biotech-derived skincare ingredients
- Those looking for additional antioxidant support in their routine
Use caution if
- Anyone with known yeast allergies (rare but possible)
- Those who prefer ingredients with extensive human clinical research
Usage tips
Safety summary
Based on available data and its similarity to other yeast ferments, this ingredient is considered safe for topical use at typical cosmetic concentrations. However, due to limited human studies, long-term safety data is not yet robust. Patch testing is recommended for those with sensitive skin or yeast allergies.
Research notes
Research is in early stages. Lab studies suggest ozonized yeast ferments have antioxidant and antimicrobial activity, but peer-reviewed human clinical trials are scarce. Most evidence comes from in vitro models and manufacturer-sponsored studies.
Common label clues
- Typical concentration
- 0.1% to 2% in leave-on products
- Regulatory status
- Approved for cosmetic use in the EU, US, and other major markets as a skin-conditioning agent. No specific restrictions beyond general cosmetic safety requirements.
- Common uses
- Serums, Moisturizers, Anti-aging creams
- Environmental note
- Ozone is generated on-site for this process, which has a moderate energy footprint. The yeast is typically grown in controlled bioreactors, reducing land use compared to plant-based ingredients.
Good to know
- The 'ozonized' prefix indicates the ingredient has been treated with ozone, which is a reactive form of oxygen.
- This ingredient is not the same as plain Saccharomyces Ferment Filtrate—the ozonation step is key to its claimed properties.
Common questions
What is Ozonized Yeast Ferment Filtrate in beauty products?
This ingredient is made by first fermenting yeast (Saccharomyces) to create a nutrient-rich liquid, then treating it with ozone gas. The idea is that ozone adds extra oxygen compounds that can help protect skin from environmental damage. It's a relatively new cosmetic ingredient, so while early lab studies look promising, we don't yet have strong human studies to confirm how well it works on skin.
What does Ozonized Yeast Ferment Filtrate do in a beauty product?
The yeast ferment provides skin-conditioning nutrients like amino acids and B vitamins. The ozonation step adds ozonides—compounds that may have antioxidant and antimicrobial properties. In theory, these ozonides can neutralize free radicals and support skin barrier function, but the exact mechanism in human skin is not yet fully understood.
Is Ozonized Yeast Ferment Filtrate safe for most people?
Based on available data and its similarity to other yeast ferments, this ingredient is considered safe for topical use at typical cosmetic concentrations. However, due to limited human studies, long-term safety data is not yet robust. Patch testing is recommended for those with sensitive skin or yeast allergies.
Who should be careful with Ozonized Yeast Ferment Filtrate?
Anyone with known yeast allergies (rare but possible) Those who prefer ingredients with extensive human clinical research
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.