What Is Bacillus/Prunus Mume Fruit Extract Ferment Filtrate?
Bacillus/Prunus Mume Fruit Extract Ferment Filtrate starts with Prunus mume, a small sour plum long valued in East Asia for both food and skin care. The fruit is rich in organic acids, sugars and natural antioxidants. To create the cosmetic ingredient, the ripe plums are first extracted in water or a mild solvent to pull out their beneficial compounds. This extract is then fermented with a safe, non-pathogenic strain of the Bacillus bacterium. During fermentation the microbe breaks down large molecules into smaller ones that are easier for skin to absorb while also producing additional skin-friendly peptides and enzymes. After fermentation the mixture is filtered, leaving a clear liquid called a filtrate that contains the transformed plum compounds along with microbial by-products that help protect and soothe skin.
The technique draws on traditional fermentation practices common in Japanese and Korean beauty rituals, updated with modern quality controls. Brands began adding this filtrate to formulas in the early 2000s, attracted by its natural origin, gentle antimicrobial action and antioxidant profile. Today you will find it in lightweight essences, anti-aging serums, hydrating gels, sheet masks and leave-on treatments aimed at calming sensitive or blemish-prone skin.
Bacillus/Prunus Mume Fruit Extract Ferment Filtrate’s Cosmetic Benefits/Uses
This fermented plum filtrate supports skin health in more than one way, making it a versatile addition to many formulas.
- Antimicrobial: Helps keep unwanted surface bacteria in check which can reduce the chance of breakouts and extend product shelf life without relying on harsh preservatives
- Antioxidant: Provides a supply of natural antioxidants that neutralize free radicals from pollution and UV exposure helping to ward off early signs of aging such as dullness and fine lines
Who Can Use Bacillus/Prunus Mume Fruit Extract Ferment Filtrate
This fermented plum filtrate is generally well tolerated by all skin types including oily, combination, normal, dry and sensitive skin. Those prone to blemishes or redness often appreciate its gentle antimicrobial and soothing nature. Extremely dry skin may still need a richer cream on top, as the filtrate itself is lightweight and water based.
The ingredient contains no animal derived material and is produced through plant extraction followed by bacterial fermentation, so it aligns with vegan and vegetarian preferences.
No data indicate a special risk for pregnant or breastfeeding women when the ingredient is used topically at the concentrations found in cosmetics. This is not medical advice; anyone who is pregnant or nursing should review all skincare products with a qualified health professional before use.
Bacillus/Prunus Mume Fruit Extract Ferment Filtrate is not known to increase photosensitivity, so it can be used day or night. Normal sun protection practices still apply.
Potential Side Effects/Adverse Reactions
- Temporary stinging or tingling on very compromised or freshly exfoliated skin
- Mild redness or irritation in individuals with a known plum or ferment sensitivity
- Allergic contact dermatitis presenting as itching, rash or swelling
- Dryness or tightness if the product formula lacks additional moisturizers
If any adverse reaction occurs stop use immediately and seek advice from a healthcare professional.
Comedogenic Rating
Rating: 0-1 (non-comedogenic to very low risk)
Bacillus/Prunus Mume Fruit Extract Ferment Filtrate is a water-based, low-molecular-weight liquid that contains no heavy oils or waxes that could block pores. Its primary components are small organic acids, peptides and antioxidants created during fermentation, all of which rinse or absorb easily without leaving residue. Because it also offers mild antimicrobial activity, it may even help keep pores clearer by discouraging acne-causing bacteria.
Suitable for acne-prone or breakout-prone skin.
As with any ingredient the final formula matters; a product rich in occlusive butters or silicones could still clog pores even if the filtrate itself does not.
Summary
Bacillus/Prunus Mume Fruit Extract Ferment Filtrate delivers two key actions: it supplies antioxidants that neutralize daily environmental stress and it offers gentle antimicrobial activity that helps keep skin balanced. Fermentation breaks the plum’s natural nutrients into smaller fragments and adds skin-friendly peptides, boosting absorption and efficacy.
Although not as mainstream as classics like green tea or niacinamide, this fermented plum filtrate has carved out a niche in K-beauty inspired serums, essences and sheet masks where fans appreciate its light feel and multitasking nature.
Current research and user feedback suggest a high safety profile with only rare reports of irritation or allergy. Still, everyone’s skin is unique so it is smart to patch test any new product containing this ingredient before full-face use.