Ingredient review

Fermented Rice Bio-Filtrate

INCI: ASPERGILLUS/SACCHAROMYCES/RICE FERMENT FILTRATE

A gentle, fermented rice filtrate that helps hydrate and condition skin, but its benefits are mostly anecdotal and vary by formulation.

beautyskincarehumectantconditioning

In plain English

This ingredient is made by fermenting rice with two types of friendly microbes (Aspergillus and Saccharomyces, which are also used in making sake and bread). The resulting liquid is rich in amino acids, vitamins, and sugars that can help moisturize and soften skin. It's similar to other fermented ingredients like galactomyces ferment filtrate, but with a different microbial team. While many people love it for a glow, the scientific evidence is still building, so think of it as a nice bonus in a well-formulated product rather than a miracle worker.

Quick decision guide

Useful, but context matters

Fermented Rice Bio-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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Fermented Rice Bio-Filtrate.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. 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

low

Less likely to sting, burn, or bother most users, though sensitive skin can still react.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

moderate

There is useful support, but formula details and claim strength still matter.

What it is

A liquid filtrate obtained after fermenting rice with Aspergillus and Saccharomyces yeasts, containing peptides, amino acids, organic acids, and sugars.

How it works

In a cosmetic product, it acts as a humectant (draws moisture into the skin) and a skin conditioner (helps keep the skin feeling soft and smooth). The fermentation process breaks down larger rice proteins into smaller peptides that may be more easily absorbed, and the organic acids can gently exfoliate the skin's surface over time.

Pros

Gentle hydration

Provides lightweight moisture without feeling heavy or sticky, making it suitable for oily and combination skin types.

Skin conditioning

Helps soften and smooth the skin's surface, which can improve the look and feel of your complexion over time.

Cons and cautions

Limited evidence

Most benefits are supported by anecdotal reports and small studies; large-scale clinical trials are lacking, so results may vary.

Variable potency

The concentration and quality of the ferment can differ between products, meaning you might not get the same effect from every formula.

Best for

  • People looking for a gentle hydrating and conditioning ingredient
  • Those who enjoy fermented skincare for a perceived glow and texture improvement

Use caution if

  • Individuals with known allergies to Aspergillus or Saccharomyces (rare)
  • Anyone with very sensitive skin who reacts to fermented ingredients

Usage tips

Use after cleansing and before heavier creams to allow the ferment to absorb well.
Pair with a moisturizer containing ceramides or niacinamide for added barrier support.
Patch test first if you have sensitive skin, especially if you're new to fermented ingredients.

Safety summary

Considered safe for topical use in cosmetics. Allergic reactions are rare but possible. The ingredient is non-irritating and non-comedogenic for most people, though those with extreme sensitivity to fermented products should proceed with caution.

Research notes

Research on this specific ferment is limited. Most evidence comes from studies on similar ferments (e.g., galactomyces) that show potential for hydration and mild exfoliation. More rigorous human trials are needed to confirm benefits.

Common label clues

Typical concentration
Typically used at 1–10% in leave-on products, though some formulations may use higher levels.
Regulatory status
Generally recognized as safe for use in cosmetics by the FDA and EU CosIng database, with no specific restrictions on concentration.
Common uses
Serums, Toners, Essences, Moisturizers
Environmental note
The fermentation process is relatively low-impact, but the rice sourcing and water usage can vary. Look for brands that source rice sustainably if this is a concern.

Good to know

  • This ingredient is a byproduct of the sake-making process, where rice is fermented with koji mold (Aspergillus) and yeast (Saccharomyces).
  • It is often found in Korean and Japanese skincare products, especially essences and toners.
  • The filtrate is typically clear or slightly yellow and has a mild, earthy scent.

Common questions

What is Fermented Rice Bio-Filtrate in beauty products?

This ingredient is made by fermenting rice with two types of friendly microbes (Aspergillus and Saccharomyces, which are also used in making sake and bread). The resulting liquid is rich in amino acids, vitamins, and sugars that can help moisturize and soften skin. It's similar to other fermented ingredients like galactomyces ferment filtrate, but with a different microbial team. While many people love it for a glow, the scientific evidence is still building, so think of it as a nice bonus in a well-formulated product rather than a miracle worker.

What does Fermented Rice Bio-Filtrate do in a beauty product?

In a cosmetic product, it acts as a humectant (draws moisture into the skin) and a skin conditioner (helps keep the skin feeling soft and smooth). The fermentation process breaks down larger rice proteins into smaller peptides that may be more easily absorbed, and the organic acids can gently exfoliate the skin's surface over time.

Is Fermented Rice Bio-Filtrate safe for most people?

Considered safe for topical use in cosmetics. Allergic reactions are rare but possible. The ingredient is non-irritating and non-comedogenic for most people, though those with extreme sensitivity to fermented products should proceed with caution.

Who should be careful with Fermented Rice Bio-Filtrate?

Individuals with known allergies to Aspergillus or Saccharomyces (rare) Anyone with very sensitive skin who reacts to fermented ingredients

Research sources

CosIng Database - EUOpenPubMed - Fermented Rice Extract in CosmeticsOpenFDA - Cosmetics SafetyOpen

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.