What Is Bacillus/Dimocarpus Longan Fruit/Soybean Ferment Filtrate?
Bacillus/Dimocarpus Longan Fruit/Soybean Ferment Filtrate is a fermented blend made by letting a friendly bacterium called Bacillus break down soybeans and longan fruit. During fermentation proteins, sugars and other plant nutrients are converted into smaller bits like peptides, amino acids and natural humectants that are easier for skin and hair to use. Fermented ingredients have been prized in food for centuries, and over the past decade beauty brands noticed that the same process can create gentler yet more active cosmetic ingredients.
To make the filtrate, crushed soybeans and longan fruit pulp are mixed with Bacillus in a controlled tank. The mixture is kept warm so the bacteria can work, usually for several days. After fermentation the liquid is filtered to remove solids, yielding a clear to light amber fluid packed with skin-loving and hair-loving compounds. This filtrate is then added to formulas.
You will spot it in hydrating facial serums, anti aging creams, sheet masks, lightweight moisturizers, leave in hair conditioners, scalp tonics and rinse-off hair masks. Formulators like it because it adds moisture while helping products feel silky and non-greasy.
Bacillus/Dimocarpus Longan Fruit/Soybean Ferment Filtrate’s Cosmetic Benefits/Uses
When included in a product this fermented filtrate can play several helpful roles:
- Hair conditioning: The peptides and sugars coat the hair shaft, making strands feel softer, smoother and easier to comb
- Humectant: It attracts water from the air and draws it into the upper layers of skin or hair, boosting hydration and reducing dryness
- Skin conditioning: The amino acids and antioxidants help support a healthy skin barrier so skin feels supple and looks more radiant
Who Can Use Bacillus/Dimocarpus Longan Fruit/Soybean Ferment Filtrate
This fermented filtrate is gentle and lightweight so it generally suits all skin types, including oily, combination, normal and dry. Its humectant nature means it can add water without leaving a greasy film which makes it a good choice for acne-prone or sensitive skin as well. No specific skin type is considered unsuitable unless you have a known soy allergy since trace soy proteins could remain after fermentation.
The ingredient is derived from plant sources and the fermentation microorganism Bacillus is non-animal, making it appropriate for vegans and vegetarians.
No studies have flagged concerns for pregnant or breastfeeding women when the filtrate is used topically in cosmetic amounts. That said this information is not medical advice and anyone who is pregnant or nursing should check with a healthcare professional before introducing new skincare or haircare products.
It does not increase sensitivity to sunlight so extra sun protection beyond your normal broad-spectrum sunscreen routine is not required. Formulators also value that it plays nicely with most other actives and preservatives so you can layer it alongside vitamin C, retinoids or salicylic acid without worries about destabilizing your routine.
Potential Side Effects/Adverse Reactions
Reactions to Bacillus/Dimocarpus Longan Fruit/Soybean Ferment Filtrate differ from person to person. The points below list potential side effects but most users will experience none of them when the ingredient is properly formulated and used as directed.
- Mild redness or stinging in very sensitive skin
- Itching or hives in people with a soy allergy
- Contact dermatitis if combined with other irritating ingredients in a formula
- Rare bacterial contamination leading to irritation if a product is poorly preserved
If you notice persistent irritation or any unexpected reaction discontinue use and seek advice from a healthcare professional
Comedogenic Rating
Rating: 0–1
This filtrate is mostly water, peptides and small sugars with only trace lipids left from the soybeans or longan fruit, so it has little to no tendency to clog pores. Fermentation further breaks down heavier molecules that might otherwise sit on the skin. Because of its lightweight humectant profile most formulators consider it functionally non-comedogenic.
That makes it a good option for people who are prone to acne or breakouts, provided the finished product is also low in pore-clogging ingredients.
As with any raw material, the final product’s overall formula and the quality of preservation play a bigger role in breakout potential than this single ingredient.
Summary
Bacillus/Dimocarpus Longan Fruit/Soybean Ferment Filtrate conditions hair, boosts skin moisture and supports a healthy barrier. The fermentation process turns soybean and longan nutrients into tiny peptides, amino acids and natural sugars that can slip into the outer skin layers or coat hair for a softer feel. These molecules grab water from the air, help hold it in place and provide a light protective film without greasiness.
While not as famous as hyaluronic acid or niacinamide, fermented plant filtrates have been gaining traction in K-beauty inspired lines and are slowly appearing in Western brands, especially in leave-on treatments and lightweight serums.
Current safety data show it to be well tolerated for most users with the main caution being a possible reaction in those allergic to soy. Still, skin can be unpredictable so perform a patch test when you try any new product that contains this ingredient.