Ingredient glossary
Galactomyces Ferment Filtrate
On your shelf ✓What Galactomyces Ferment Filtrate does for your skin, who it suits, and what to watch for.
INCI: Galactomyces Ferment Filtrate · Also: Galactomyces Ferment, Pitera
In short: Galactomyces Ferment Filtrate delivers sebum regulation and brightening, suits combination and oily skin best, and the evidence behind it is moderate.
- What it does
- Sebum regulation, brightening
- Best for
- Combination, Oily skin
- Evidence
- Moderate
- How long
- Under 2 weeks
how it was measured
Measured on facial pore area, surface roughness and redness by standardised self-imaging, weekly averages; the first visit at which the change was measurable.PMID 34198790PMID 33938432PMID 36769815
The Glow take
Nice to have, and nothing to overthink.
Galactomyces Ferment Filtrate plays a quiet supporting role, rounding out a formula rather than being the reason you buy it.
— Maya
What it does
- sebum regulation
- brightening
- texture
moderate evidenceAn essence containing ninety seven percent galactomyces ferment filtrate reduced sebum pore counts keratin and acne and slightly increased skin brightness in a…
Why we say this
- An essence containing ninety seven percent galactomyces ferment filtrate reduced sebum pore counts keratin and acne and slightly increased skin brightness in a twenty-volunteer study.
- CIR safety review Final Report - Safety Assessment of Yeast-Derived Ingredients as Used in Cosmetics 2024
On a label: usually effective at 50-97%.
How much do you need?
Not established
No human trial pins a dose. The reasoning is below, and it is the honest answer.
Why we say this
- No vehicle-controlled trial at any concentration.
- The two Procter and Gamble studies gave 47 and 57 young Japanese women a 4-week no-treatment baseline and then a Pitera essence, described as more than 90% galactomyces ferment filtrate, twice daily for 4 weeks, and pore area, roughness and redness fell against each woman's own baseline (Miyamoto 2021); a before-and-after with no placebo essence cannot separate the ferment from water, humectant and habit.
- The cosmetic safety assessment of yeast-derived ingredients covers safety, not dose (CIR 2024).
- Essences list it at 50 to 97% and serums far lower; nothing published says the lower levels do anything, and nothing says the high ones beat a plain essence.
Who it's for, and who should skip it
Tends to suit
- oily
- combo
- acne prone
- pigmentation
Approach with care
- very sensitive
- Clogs poresLow
- Irritation riskLow
- Allergen originComes from yeast
How it fits each skin type
- DryNeutral
- CombinationSuits
- OilySuits
- SensitiveTake care
Often chosen for acne prone, pigmentation.
Where it fits in your routine
Give it under two weeks — that is when the change first became measurable.
What was measured, and in whom
- Measured on: facial pore area, surface roughness and redness by standardised self-imaging, weekly averages.
- Two independent 8-week studies (n=47 and n=57) gave each subject a 4-week no-treatment baseline measurement period and then a >90% galactomyces ferment filtrate essence, described in the methods as carrying no other skin-conditioning ingredients, twice daily for 4 weeks, with facial images captured three times a day.
- Pore area, roughness and redness were all significantly below the baseline period from the first treatment week onward, and the morning-to-evening fluctuation narrowed with them, consistently in both studies.
- The limitation is the missing vehicle arm: the comparison is the subject's own untreated run-in, so the contribution of simply applying a liquid twice daily is not subtracted, and all authors are employed or funded by the company selling the essence.
- The brightening and sebum endpoints the base scores are not what these studies measured, and the concentration tested is the neat essence, not the ferment percentages of ordinary products.
Miyamoto K, Dissanayake B, Omotezako T, Takemura M, Tsuji G, Furue M. J Clin Med 2021;10(11):2502. PMID:34198790. Combination-product studies rejected: PMID:33938432 (GFF + dexpanthenol + Centella serum) and PMID:36769815 (three-product 12-month regimen, no control).
Plays well with
- niacinamide
- vitamin c
- humectants
Galactomyces Ferment Filtrate, answered
Is Galactomyces Ferment Filtrate safe during pregnancy?
Yes. Galactomyces Ferment Filtrate is considered safe to use during pregnancy and breastfeeding. As with anything, if you are unsure it is worth a quick word with your doctor or midwife.
Who should avoid Galactomyces Ferment Filtrate?
Approach Galactomyces Ferment Filtrate with care if any of these apply to you: very sensitive.
What concentration of Galactomyces Ferment Filtrate actually works?
Galactomyces Ferment Filtrate tends to do its job in the 50 to 97% range. Much lower and it is likely underdosed.
Compare Galactomyces Ferment Filtrate with
30 comparisons built, the 1 most looked-up above.
Can you mix Galactomyces Ferment Filtrate with
2 pairings built.
This, for every label you own
One ingredient is easy. A full label is where it gets confusing. The Ingredient Decoder reads any product and tells you the honest truth, ingredient by ingredient.
Sources & how we reviewed this
- CIR safety review Final Report - Safety Assessment of Yeast-Derived Ingredients as Used in Cosmetics 2024summary page only, the document itself was not read
What changed on this page
- : the highest dose tested
- : what the EU regulates
- : the effective dose from trials