Ingredient review

Fusidium Coccineum Ferment Filtrate

INCI: Fusidium Coccineum Ferment Filtrate

A gentle, fermentation-derived ingredient that may help calm skin and fight environmental stress, but research is still early.

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In plain English

Fusidium Coccineum Ferment Filtrate is made by fermenting a type of fungus found in the ocean. The resulting liquid is rich in compounds that can help soothe irritated skin and protect it from damage caused by things like pollution and UV rays. Think of it as a gentle, natural-ish helper for sensitive or stressed skin.

Review score

Safety, usefulness, and evidence

3.8Good
3.8/ 5

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
How reviews are scored

Quick decision guide

Useful, but context matters

Fusidium Coccineum 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.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Fusidium Coccineum Ferment 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

emerging

The ingredient may be promising, but claims should be treated more cautiously.

What it is

A filtrate obtained from the fermentation of the marine fungus Fusidium coccineum, containing bioactive metabolites like polysaccharides and antioxidants.

How it works

In a cosmetic product, it is believed to work by providing antioxidant activity to neutralize free radicals and by supporting the skin's natural barrier function, which can reduce redness and irritation.

Pros

Gentle on skin

Unlikely to cause irritation, making it suitable for sensitive skin types.

Antioxidant support

Helps protect skin from daily environmental damage like pollution and UV exposure.

Cons and cautions

Limited research

Most evidence comes from lab studies, not large human trials, so its effectiveness is not fully proven.

Less potent than alternatives

Compared to well-studied antioxidants like vitamin C or ferulic acid, its protective power may be milder.

Best for

  • People with sensitive or easily irritated skin
  • Those looking for a gentle antioxidant ingredient

Use caution if

  • Anyone with a known allergy to fungi or fermented ingredients (rare)

Usage tips

Use in a serum or moisturizer as part of your morning routine for antioxidant protection.
Pair with sunscreen to enhance protection against UV-related damage.

Safety summary

Fusidium Coccineum Ferment Filtrate is considered safe for topical use with a low risk of irritation or allergy. However, as with any new ingredient, patch testing is recommended for those with very sensitive skin.

Research notes

Early research suggests antioxidant and anti-inflammatory potential, but most data comes from in vitro studies. More human clinical trials are needed to confirm benefits.

Common label clues

Typical concentration
Typically used at 0.5% to 2% in leave-on products
Regulatory status
Generally recognized as safe for cosmetic use in the US and EU, with no specific restrictions.
Common uses
Serums, Moisturizers, Soothing creams
Environmental note
Produced via fermentation, which is a relatively sustainable biotech process compared to harvesting wild marine organisms.

Good to know

  • This ingredient is often found in K-beauty and clean beauty products.
  • It is a byproduct of fermentation, not a whole fungus, so it is generally well-tolerated.

Common questions

What is Fusidium Coccineum Ferment Filtrate in beauty products?

Fusidium Coccineum Ferment Filtrate is made by fermenting a type of fungus found in the ocean. The resulting liquid is rich in compounds that can help soothe irritated skin and protect it from damage caused by things like pollution and UV rays. Think of it as a gentle, natural-ish helper for sensitive or stressed skin.

What does Fusidium Coccineum Ferment Filtrate do in a beauty product?

In a cosmetic product, it is believed to work by providing antioxidant activity to neutralize free radicals and by supporting the skin's natural barrier function, which can reduce redness and irritation.

Is Fusidium Coccineum Ferment Filtrate safe for most people?

Fusidium Coccineum Ferment Filtrate is considered safe for topical use with a low risk of irritation or allergy. However, as with any new ingredient, patch testing is recommended for those with very sensitive skin.

Who should be careful with Fusidium Coccineum Ferment Filtrate?

Anyone with a known allergy to fungi or fermented ingredients (rare)

Research sources

Cosmetic Ingredient Review (CIR) - Safety of Ferment FiltratesOpenPubMed - Antioxidant activity of Fusidium coccineum metabolitesOpenINCI Decoder - Fusidium Coccineum Ferment FiltrateOpen

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.