What Is Leuconostoc/Morus Bombycis Ferment Extract Filtrate?
Leuconostoc/Morus Bombycis Ferment Extract Filtrate is a fermented botanical ingredient made by letting Leuconostoc, a lactic acid bacteria often used in food fermentation, work on Morus bombycis, a type of mulberry valued for its naturally rich mix of sugars, vitamins and polyphenols. During the controlled fermentation the bacteria break down mulberry compounds into smaller, more skin friendly molecules and release extra humectants and antioxidants. After fermentation the mixture is carefully filtered to remove solids and microbes, leaving behind a clear fluid packed with skin conditioning elements.
Fermented plant extracts rose to fame in East Asian skin care in the early 2000s when brands looked for gentle yet effective ways to boost hydration and support the skin’s natural barrier. This particular filtrate followed that trend since mulberry is already prized for brightness and Leuconostoc fermentation adds an extra layer of soothing benefits.
To make it manufacturers start with clean, finely milled mulberry leaves or fruit, add a culture of Leuconostoc bacteria then keep the mixture at a steady temperature for several days. Once the desired pH and nutrient profile are reached the liquid is filtered and stabilized so it can be mixed into cosmetic bases.
You will usually spot Leuconostoc/Morus Bombycis Ferment Extract Filtrate in hydrating masks, lightweight serums, daily moisturizers, anti aging creams, calming lotions and specialty treatments aimed at dull or stressed skin.
Leuconostoc/Morus Bombycis Ferment Extract Filtrate’s Cosmetic Benefits/Uses
This fermented filtrate is mainly valued for one key role in skin care formulas.
Skin conditioning: the blend of natural humectants, amino acids and antioxidant compounds helps draw water into the outer skin layer, soften rough patches and support a healthy looking barrier. Regular use can leave skin feeling smoother, more supple and less prone to dryness induced tightness.
Who Can Use Leuconostoc/Morus Bombycis Ferment Extract Filtrate
This gentle fermented filtrate is generally considered suitable for all skin types including dry, normal, combination, oily and sensitive because it focuses on hydration and barrier support without leaving a heavy or greasy residue. Extremely reactive skin or anyone with a known mulberry or fermentation related allergy should proceed with caution since even mild botanical compounds can sometimes trigger a response.
The ingredient is created from mulberry plant matter and a harmless food grade bacteria with no animal derived inputs, so it fits easily into vegan and vegetarian routines.
Current safety data shows no specific concerns for topical use during pregnancy or while breastfeeding. Still, this is not medical advice; anyone expecting or nursing should run any new skincare product by their physician to be on the safe side.
Leuconostoc/Morus Bombycis Ferment Extract Filtrate is not known to increase photosensitivity, meaning it will not make skin more prone to sunburn. Basic sun protection practices are still recommended for overall skin health.
Potential Side Effects/Adverse Reactions
Side effects and reactions to the topical application of Leuconostoc/Morus Bombycis Ferment Extract Filtrate can vary from person to person. The following is a list of potential side effects but they are uncommon when the ingredient is properly formulated and used in standard cosmetic concentrations.
- Skin irritation such as redness or mild burning sensation
- Allergic contact dermatitis in individuals sensitive to mulberry extracts or fermentation by products
- Temporary stinging on freshly exfoliated or compromised skin barriers
- Rare breakouts or clogged pores in very acne prone users if the overall product base is heavy or occlusive
If you experience any of these negative effects stop using the product immediately and consult a healthcare professional if symptoms persist or worsen.
Comedogenic Rating
Rating: 0 / 5
Leuconostoc/Morus Bombycis Ferment Extract Filtrate is water based with small molecular humectants and antioxidants that absorb quickly rather than sit on the skin surface trapping oil or debris. It contains no heavy oils, waxes or fatty alcohols that typically block pores which is why it earns a 0 rating.
That makes it generally suitable for people prone to acne or breakouts.
Keep in mind that overall product formulation and individual skin reactions can still influence breakouts even when the raw ingredient is non comedogenic.
Summary
Leuconostoc/Morus Bombycis Ferment Extract Filtrate is used in cosmetics as a skin conditioning agent that boosts hydration, softens texture and supplies antioxidant support. Fermentation breaks down mulberry nutrients into smaller compounds and creates extra humectants so the filtrate can pull water into the outer skin layer and reinforce the moisture barrier.
While not as mainstream as hyaluronic acid or niacinamide the ingredient is gaining quiet popularity in K beauty inspired formulas and niche hydrating serums thanks to consumer interest in fermented botanicals.
Current data shows it is low risk for topical use with minimal reports of irritation or pore clogging. As with any new skincare addition it is wise to patch test first to confirm personal compatibility.