What Is Galactomyces/Soymilk Ferment Filtrate?
Galactomyces/Soymilk Ferment Filtrate is a liquid that comes from fermenting soymilk with a friendly yeast called Galactomyces. During fermentation the yeast breaks down proteins, sugars and lipids in the soymilk and releases skin-loving compounds such as amino acids, vitamins, minerals and natural moisturizers called saccharides. First noticed in the 1970s when workers at a sake brewery were praised for their smooth youthful hands, Galactomyces extracts soon found their way into Asian skin care labs. Adding soymilk to the process boosted the nutrient mix and created this specific ferment filtrate, which is obtained by filtering out the solids after fermentation to leave a clear concentrated liquid.
To make it, manufacturers prepare soymilk, inoculate it with Galactomyces, let it ferment under controlled warmth then pass the mixture through fine filters. The resulting filtrate is collected, tested for safety and blended into cosmetic bases. You will often see it in hydrating essences, sheet masks, anti-aging serums, lightweight moisturizers, brightening lotions and post-exfoliation treatments where a quick moisture boost is needed.
Galactomyces/Soymilk Ferment Filtrate’s Cosmetic Benefits/Uses
This ferment filtrate mainly serves as a humectant in skin care formulas, meaning it attracts and holds water on the skin surface. By drawing moisture from the environment and from deeper skin layers it helps keep the outer layer plump, smooth and supple. Better hydration can soften the look of fine lines, improve skin elasticity, support barrier function and give a fresher more radiant appearance.
Who Can Use Galactomyces/Soymilk Ferment Filtrate
This ferment filtrate is gentle enough for most skin types. Dry and dehydrated skin benefit from its moisture binding ability while oily or combination skin appreciate its lightweight non greasy feel. Sensitive skin usually tolerates it well because it contains no added fragrance or essential oils, though anyone with a known soy or yeast allergy should steer clear.
The ingredient is plant based since it comes from soymilk and a microscopic yeast, so it fits vegan and vegetarian lifestyles without issue.
There is no specific evidence suggesting harm for pregnant or breastfeeding women when the ferment is used topically and in the tiny amounts found in cosmetics. That said this is not medical advice and expecting or nursing mothers should always run any skincare routine past their doctor for peace of mind.
Galactomyces/Soymilk Ferment Filtrate does not make skin more sensitive to sunlight so you do not need to take extra sun precautions beyond the usual daily sunscreen.
Potential Side Effects/Adverse Reactions
Reactions to topical Galactomyces/Soymilk Ferment Filtrate differ from one person to another. The effects listed below are only potential issues and most users will enjoy the ingredient without problems when it is properly formulated.
- Redness or itching in people with a soy or yeast allergy
- Mild stinging or burning on very compromised or freshly exfoliated skin
- Temporary breakouts if the overall product is too rich for oily acne prone skin
- Fungal acne flare ups in individuals who react poorly to ferment based ingredients
If you notice any of these effects stop using the product and seek guidance from a healthcare professional or dermatologist.
Comedogenic Rating
Rating: 1 out of 5
Galactomyces/Soymilk Ferment Filtrate is mostly water with small molecules like amino acids and sugars that soak in quickly instead of sitting on the surface. It contains almost no heavy oils or waxes that could clog pores which is why it earns a low score of 1. This makes it generally suitable for people who are prone to acne or breakouts. If a product with this ferment does trigger blemishes it is usually because of other richer ingredients in the formula rather than the ferment itself.
As with many ferments there is a slim chance some users may notice fungal acne flare-ups if they are very sensitive to yeast-derived ingredients, but this is uncommon.
Summary
Galactomyces/Soymilk Ferment Filtrate acts mainly as a humectant that draws water to the skin then holds it there. By boosting surface moisture it helps smooth fine lines, supports a healthy barrier and leaves skin looking fresh and dewy. Its light feel has made it a staple in Korean and Japanese essences, sheet masks and lightweight serums, though it is still less known in Western brands.
Topical use is considered safe for most people with the main caution being for anyone who has a soy or yeast allergy. Overall it has a low comedogenic rating and a low irritation risk which means it slots easily into many routines. As with any new skincare ingredient do a quick patch test before applying it all over just to be on the safe side.