Ingredient review
Rhizopus/Saccharomyces Collagen Ferment Filtrate
INCI: RHIZOPUS/SACCHAROMYCES/COLLAGEN FERMENT FILTRATE
A fermented collagen ingredient that may help hydrate and condition skin, but research is still early and benefits are not yet proven in large human studies.
In plain English
This ingredient is made by fermenting collagen with two types of microbes: Rhizopus (a type of mold used in food fermentation) and Saccharomyces (brewer's yeast). The fermentation process breaks down collagen into smaller pieces, called peptides, which may be easier for skin to absorb. In skincare, it's used to help moisturize and support a smoother skin feel. However, unlike pure collagen peptides, the exact composition and benefits of this ferment filtrate are less studied, so it's best seen as a gentle hydrating booster rather than a proven anti-aging powerhouse.
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
Rhizopus/Saccharomyces Collagen 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 Rhizopus/Saccharomyces Collagen 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 filtrate obtained after fermenting collagen with Rhizopus and Saccharomyces microorganisms, containing peptides, amino acids, and other bioactive byproducts.
How it works
The fermentation process breaks down large collagen molecules into smaller peptides and amino acids. When applied to skin, these smaller molecules may help attract and retain moisture (humectant effect) and provide building blocks that support the skin's natural matrix. The ferment itself may also contain enzymes and metabolites that gently exfoliate or condition the skin surface.
Pros
Gentle hydration
The ferment filtrate acts as a humectant, helping skin hold onto moisture without irritation, making it suitable for sensitive or dry skin.
Fermentation may boost absorption
The fermentation process breaks collagen into smaller peptides, which may be more easily absorbed by the skin compared to larger collagen molecules.
Cons and cautions
Limited research
There are very few peer-reviewed studies on this specific ingredient, so its benefits are based more on theory than solid evidence.
Unclear potency
Because it's a filtrate, the concentration of active peptides can vary between products, making it hard to know how much you're actually getting.
Best for
- Anyone looking for a gentle hydrating ingredient in serums or moisturizers
- People interested in fermented skincare ingredients for their potential probiotic benefits
Use caution if
- Those with known allergies to mold or yeast (rare, but possible)
Usage tips
Safety summary
This ingredient is considered safe for topical use. The fermentation process is controlled and the final filtrate is purified. Allergic reactions are very rare, but anyone with a known sensitivity to mold or yeast should patch-test first.
Research notes
Evidence is primarily theoretical and based on the known benefits of collagen peptides and fermentation. Direct human studies on this specific ferment filtrate are lacking, so its efficacy is not yet confirmed by robust clinical data.
Common label clues
- Typical concentration
- Typically 0.5% to 5% in leave-on products
- Regulatory status
- Generally recognized as safe for cosmetic use in the US and EU when used as intended. Not a drug ingredient.
- Common uses
- Serums, Moisturizers, Sheet masks, Anti-aging creams
- Environmental note
- The fermentation process is relatively low-energy and uses renewable microbial cultures, making it a more sustainable alternative to animal-derived collagen.
Good to know
- This ingredient is often listed near the end of an ingredient list, meaning it's used in low concentrations.
- Fermented ingredients are popular in K-beauty for their gentle, skin-conditioning properties.
Common questions
What is Rhizopus/Saccharomyces Collagen Ferment Filtrate in beauty products?
This ingredient is made by fermenting collagen with two types of microbes: Rhizopus (a type of mold used in food fermentation) and Saccharomyces (brewer's yeast). The fermentation process breaks down collagen into smaller pieces, called peptides, which may be easier for skin to absorb. In skincare, it's used to help moisturize and support a smoother skin feel. However, unlike pure collagen peptides, the exact composition and benefits of this ferment filtrate are less studied, so it's best seen as a gentle hydrating booster rather than a proven anti-aging powerhouse.
What does Rhizopus/Saccharomyces Collagen Ferment Filtrate do in a beauty product?
The fermentation process breaks down large collagen molecules into smaller peptides and amino acids. When applied to skin, these smaller molecules may help attract and retain moisture (humectant effect) and provide building blocks that support the skin's natural matrix. The ferment itself may also contain enzymes and metabolites that gently exfoliate or condition the skin surface.
Is Rhizopus/Saccharomyces Collagen Ferment Filtrate safe for most people?
This ingredient is considered safe for topical use. The fermentation process is controlled and the final filtrate is purified. Allergic reactions are very rare, but anyone with a known sensitivity to mold or yeast should patch-test first.
Who should be careful with Rhizopus/Saccharomyces Collagen Ferment Filtrate?
Those with known allergies to mold or yeast (rare, but possible)
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.