What Is Bacillus/Monascus/Houttuynia Cordata Leaf/Rice Bran Ferment Filtrate?
Bacillus/Monascus/Houttuynia Cordata Leaf/Rice Bran Ferment Filtrate is a liquid derived from fermenting Houttuynia cordata leaves and rice bran with two friendly microorganisms, Bacillus and Monascus. The fermentation breaks down the plant material and releases skin-loving compounds such as amino acids, organic acids, trace vitamins and gentle pigments produced by Monascus. Houttuynia cordata, also called chameleon plant, has long been used in East Asian herbal traditions, while rice bran has been prized in Japanese beauty rituals for its softening properties. Modern cosmetic chemists combined these botanicals with controlled fermentation in search of a natural way to manage excess oil and support clearer skin. To make the filtrate, the leaves and bran are mixed with a nutrient solution, inoculated with the microbes and left to ferment at warm temperatures. After several days the mixture is filtered to remove solids, leaving a clear to lightly tinted liquid that slips easily into water-based formulas. You will most often spot this ingredient in lightweight facial toners, serums aimed at oily or blemish-prone skin, soothing sheet masks, scalp sprays and even tinted lotions where its subtle reddish hue can replace synthetic dyes.
Bacillus/Monascus/Houttuynia Cordata Leaf/Rice Bran Ferment Filtrate’s Cosmetic Benefits/Uses
This multitasking ferment earns its place on an ingredient list for several helpful reasons:
- Anti-Sebum: Helps regulate the amount of oil the skin produces which can leave a matte finish, reduce shine through the day and lower the chance of clogged pores in oily and combination skin types
- Antimicrobial: Provides a mild, natural defense against acne-causing bacteria and scalp microbes supporting clearer skin and a fresher scalp without relying on harsh preservatives
- Colorant: Contains gentle reddish pigments from the Monascus yeast that can give products a soft, warm tint adding visual appeal while reducing the need for synthetic dyes
Who Can Use Bacillus/Monascus/Houttuynia Cordata Leaf/Rice Bran Ferment Filtrate
This ferment is well suited to oily, combination and acne-prone skin because of its ability to temper excess sebum and discourage breakout-causing microbes. Normal skin can also benefit from its lightweight hydration and gentle antioxidant touch. Very dry skin may still enjoy it layered under richer creams, though it will not supply heavy moisture on its own. Sensitive skin usually tolerates the filtrate thanks to its mild pH and lack of added fragrances, but anyone with a known rice or Houttuynia allergy should tread carefully.
The ingredient is produced solely from plant material and food-grade microorganisms so it fits vegan and vegetarian preferences with no animal-derived components or by-products involved in the fermentation or filtration steps.
No data suggest that the filtrate poses a specific risk to women who are pregnant or breastfeeding when used topically in cosmetic concentrations. Still, this is not medical advice and expecting or nursing mothers should run any new skincare product past their doctor just to be on the safe side.
The ferment does not increase photosensitivity, meaning it will not make skin more prone to sunburn. Standard daily sunscreen is still recommended for overall skin health. The ingredient pairs well with most actives, including niacinamide and gentle exfoliating acids, without notable conflicts.
Potential Side Effects/Adverse Reactions
Side effects and reactions to the topical application of Bacillus/Monascus/Houttuynia Cordata Leaf/Rice Bran Ferment Filtrate can vary from person to person. The following list covers potential issues but they are unlikely to be the typical user experience when the ingredient is formulated correctly.
- Mild skin irritation such as tingling or warmth during initial uses
- Temporary redness in very reactive or compromised skin barriers
- Allergic contact dermatitis in individuals sensitive to rice, Houttuynia cordata or fermentation by-products
- Staining of very light fabrics if the product’s natural tint is not fully absorbed before dressing
If you experience any discomfort, discoloration or persistent irritation stop using the product and consult a healthcare professional.
Comedogenic Rating
Rating: 1 / 5
The filtrate is largely water based and contains minimal residual oils so it is very unlikely to block pores. Fermentation breaks down rice bran lipids into smaller, more skin compatible molecules that rinse away easily, further lowering clogging potential. A trace amount of bran-derived fatty acids remains which is why the rating is not a perfect zero. Overall it is considered safe for those prone to acne or breakouts and may even help keep pores clearer thanks to its anti-sebum action.
No data suggest that the natural reddish pigments deposit inside pores or worsen blackheads. Formulators typically use this ingredient at low percentages which also keeps the risk of congestion minimal.
Summary
Bacillus/Monascus/Houttuynia Cordata Leaf/Rice Bran Ferment Filtrate is valued for three main jobs in cosmetics: it tempers excess oil, gently curbs acne-related microbes and supplies a soft natural tint. The fermentation process converts plant nutrients into lightweight amino acids, organic acids and antioxidants that signal sebaceous glands to slow down while creating an environment less friendly to bacteria. At the same time Monascus yeast produces subtle reddish pigments that double as a cosmetic colorant.
The ingredient is a niche favorite in Korean and Japanese formulations but has yet to break into mainstream Western shelves. Its multitasking nature and clean label appeal suggest growing interest in the months ahead.
Current safety data show low irritation and very low comedogenicity so most users can enjoy it without concern. As with any new skincare ingredient a quick patch test is smart practice before adding a full-sized product to your routine.