Galactomyces Ferment Filtrate
Korean: 갈락토미세스 발효 여과물
brightening, pore-minimizing, hydrating
A yeast-derived ferment (a byproduct of sake fermentation) rich in vitamins, amino acids, and minerals. Brightens skin, minimizes pores, and improves overall skin texture. One of the most iconic K-beauty ingredients, found in the famous SK-II Facial Treatment Essence and widely adopted in Korean brands.
About Galactomyces Ferment Filtrate
Galactomyces Ferment Filtrate is a powerhouse ingredient born from the sake brewing process, discovered when Japanese scientists noticed the remarkably youthful hands of sake brewery workers. This yeast-derived ferment is loaded with vitamins (especially B vitamins), amino acids, organic acids, and minerals that work together to transform skin texture and radiance. It's not just hype, this ingredient has earned its reputation as one of K-beauty's most celebrated actives, appearing in 56 products on Seoul Sister, including cult favorites like Numbuzin's No. 3 Skin Softening Serum (5.0/5). What makes Galactomyces special is its multitasking ability. It brightens dullness by gently accelerating cell turnover, minimizes the appearance of pores by regulating sebum and improving skin texture, and delivers deep hydration that makes skin look plumper and more refined. The fermentation process breaks down these nutrients into smaller molecules that penetrate skin more effectively than their non-fermented counterparts. Korean brands have perfected formulations that showcase this ingredient's versatility, from essence-style serums to peeling gels like ma:nyo's Galactomy Enzyme Peeling Gel (4.8/5). Unlike more aggressive brightening ingredients, Galactomyces works gradually and gently, making it suitable for most skin types and a staple in long-term skin health routines rather than quick-fix solutions.
How Galactomyces Ferment Filtrate Works
At the cellular level, Galactomyces Ferment Filtrate works through multiple pathways. The fermentation process produces beta-glucans and saccharides that strengthen the skin barrier and boost moisture retention. Its rich amino acid profile provides building blocks for protein synthesis, supporting collagen production and skin repair. The organic acids (particularly lactic acid) provide gentle chemical exfoliation, dissolving the bonds between dead skin cells to reveal fresher, brighter skin underneath without the irritation of stronger acids. Meanwhile, the vitamins, especially niacinamide-like compounds, help inhibit melanin transfer to surface skin cells, addressing dark spots and uneven tone. The minerals (zinc, magnesium, calcium) act as cofactors for enzymatic processes that regulate sebum production and pore size. Perhaps most importantly, Galactomyces produces proteins and peptides during fermentation that have been shown to communicate with skin cells, essentially telling them to behave more youthfully. This multi-mechanism approach explains why users see improvements across multiple concerns rather than just one specific issue.
Galactomyces Ferment Filtrate by Skin Type
Oily Skin
Galactomyces is excellent for oily skin, with products like Anua's Peach 77 Niacin Conditioning Milk (5.0/5) specifically targeting excess sebum. It helps regulate oil production through its mineral content while the gentle exfoliating acids prevent pore congestion. The lightweight, watery texture of most Galactomyces products absorbs quickly without adding greasiness.
Dry Skin
Dry skin benefits significantly from Galactomyces' hydrating properties. The beta-glucans and saccharides act as humectants, drawing moisture into skin and helping it retain hydration throughout the day. The barrier-strengthening effects also reduce trans-epidermal water loss, addressing the root cause of chronic dryness rather than just masking it with occlusives.
Combo Skin
This ingredient is practically made for combination skin. It balances oil production in the T-zone while hydrating drier cheek areas, addressing both concerns simultaneously. Products like Numbuzin's No. 3 Skin Softening Serum (5.0/5) are particularly popular with combination skin types for this exact reason.
Sensitive Skin
Galactomyces is generally well-tolerated by sensitive skin due to its gentle nature and skin-identical nutrients. However, a small percentage of people (roughly 3-5%) can develop sensitivity to fermented ingredients. Always patch test first, especially if you have fungal acne or known yeast sensitivities, though true reactions are uncommon.
Normal Skin
Normal skin can use Galactomyces as a preventative, maintenance ingredient to keep skin functioning optimally. It enhances natural radiance, refines texture, and provides antioxidant protection against environmental stressors that could eventually compromise your skin's healthy state.
How to Use Galactomyces Ferment Filtrate
- 1Apply Galactomyces products on damp skin right after cleansing for maximum absorption, the watery consistency allows it to penetrate deeply when skin is slightly hydrated.
- 2Layer it before heavier serums or moisturizers in your routine, Galactomyces works best as a first or second step treatment to prep skin for subsequent products.
- 3Give it 4-6 weeks to see full results, this ingredient works gradually by supporting natural cell turnover rather than forcing dramatic overnight changes.
- 4If you're new to ferments, start with products that list Galactomyces in the first five ingredients for optimal concentration, like Ilso's Pore Repair Spicule Peeling Ampoule (5.0/5).
- 5Store Galactomyces products away from direct sunlight and heat to preserve the living nutrients and prevent the ferment from degrading.
Background
The discovery of Galactomyces Ferment Filtrate reads like skincare folklore. Japanese sake brewery workers were observed to have remarkably soft, youthful hands despite their age, even while their facial skin showed typical aging signs. Scientists traced this to constant contact with fermenting sake, specifically the yeast byproducts. This led to decades of research isolating the specific strain of Galactomyces yeast responsible for these benefits. SK-II famously pioneered Pitera, their proprietary version of this ferment, in the 1980s, but the ingredient truly exploded in popularity when Korean brands began incorporating it into more accessible products in the 2010s. Korean skincare scientists refined fermentation techniques and combined Galactomyces with complementary ingredients like niacinamide and hyaluronic acid, creating the multi-benefit essences and serums that define K-beauty today. Now it's considered a foundational ingredient in Korean routines, particularly for those focused on achieving the coveted "glass skin" look.
Addresses These Concerns
K-Beauty Products with Galactomyces Ferment Filtrate
View all 56 →
No. 3 Skin Softening Serum
Numbuzin
Pore Repair Spicule Peeling Ampoule
Ilso
Galactomy Enzyme Peeling Gel
ma:nyo
Collagen Mask To Foam Cleanser
Biodance
Blemish Cleansing Oil
Papa Recipe
Red Lacto Collagen Cleansing Oil 2.0 Special Set
Medi-Peel
Galactomy Peeling Gel
ma:nyo
Ultra V Idebenone Prestige Ampoule 3ea
Anua
Collagen Mask To Foam Cleanser Set
Biodance
Rice Matgeolli Cleansing Foam
Beplain
Red Lacto Collagen Cleansing Oil 2.0
MEDIPEEL
P.CALM Holy Basil Green Capsule Pack To Foam Cleanser
Beplain
Frequently Asked Questions
Is Galactomyces Ferment Filtrate the same as Pitera in SK-II?▼
Can I use Galactomyces if I have fungal acne?▼
How long does it take to see brightening results?▼
Can I use Galactomyces with vitamin C or retinol?▼
Why do some Galactomyces products smell funky?▼
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