What Is Bacillus/Monascus/Zizyphus Jujuba Fruit/Soybean Ferment Filtrate?
Bacillus/Monascus/Zizyphus Jujuba Fruit/Soybean Ferment Filtrate is a fermented liquid made from soybeans (Glycine max) and jujube fruit that have been co fermented by two friendly microorganisms, Bacillus and Monascus. Fermentation breaks down the raw plant material into smaller molecules like amino acids, peptides, antioxidants and natural moisturizers that skin can easily recognize. The process begins by soaking and cooking the soybeans and jujube fruit, then introducing the microbes under controlled warmth and humidity. Over several days the microbes digest sugars and proteins, unlocking skin beneficial compounds. After fermentation the mixture is filtered to remove solids, leaving a clear or slightly tinted liquid rich in nutrients.
Traditional East Asian foods such as red yeast rice and natto have long relied on Bacillus and Monascus strains. Cosmetic chemists noticed the softening effect these fermented foods had on skin, so labs adapted the same microbes and plant sources for beauty formulas. The resulting filtrate brings a blend of natural antioxidants from soy, soothing sugars from jujube fruit and mild acids produced during fermentation.
You are most likely to find this ingredient in hydrating sheet masks, anti aging serums, lightweight lotions, soothing gels and leave on treatments aimed at dull or tired skin. It fits well in water based formulas and pairs easily with other botanical extracts.
Bacillus/Monascus/Zizyphus Jujuba Fruit/Soybean Ferment Filtrate’s Cosmetic Benefits/Uses
This fermented filtrate serves several helpful roles in skin care products.
- Antioxidant: The fermentation step concentrates natural compounds like isoflavones and polyphenols that help neutralize free radicals, supporting a brighter healthier looking complexion and protecting formulas from early spoilage.
- Skin Conditioning: Small peptides, sugars and amino acids created during fermentation boost hydration, improve softness and promote a smoother texture, making skin feel calm and refreshed.
- Emollient: Although lightweight, the filtrate leaves behind a thin veil that helps reduce moisture loss throughout the day, contributing to a supple comfortable finish.
Who Can Use Bacillus/Monascus/Zizyphus Jujuba Fruit/Soybean Ferment Filtrate
The light watery nature of this ferment makes it a good fit for nearly every skin type including oily, combination, normal and dry skin. Sensitive skin usually tolerates it well because the pH is close to that of healthy skin and it contains no added fragrance or harsh alcohols. The only group that might need extra caution is anyone with a known soy allergy since trace soy proteins may remain after filtration and could trigger a reaction.
Because the raw materials are plant based and the fermentation relies only on microorganisms, the ingredient is suitable for vegans and vegetarians. No animal derivatives are used at any stage of production.
Pregnant and breastfeeding women can generally use products containing this filtrate as there is no evidence of hormonal disruption or vitamin A derivatives. That said this is not medical advice, so expectant or nursing mothers should show the product label to their healthcare provider before adding it to a routine.
The filtrate does not make skin more sensitive to the sun and will not interfere with common actives like vitamin C or niacinamide. Regular sunscreen is still recommended for daily protection.
Potential Side Effects/Adverse Reactions
Reactions to topical Bacillus/Monascus/Zizyphus Jujuba Fruit/Soybean Ferment Filtrate vary from person to person. The following is a list of potential side effects that could occur, though most users will not experience them when the ingredient is properly formulated in a product.
- Redness or stinging in very sensitive skin, especially if the formula also contains exfoliating acids
- Mild itching or rash in individuals allergic to soy or jujube fruit
- Contact dermatitis if used alongside heavily fragranced products that already irritate the skin barrier
- Rare breakout flare up in those prone to fungal acne due to the presence of fermentation by-products
If any of these reactions occur stop using the product immediately and seek advice from a qualified healthcare professional.
Comedogenic Rating
Rating: 1/5. This filtrate is mostly water based with very little oil so it rarely clogs pores. The molecules produced during fermentation are small and lightweight allowing them to absorb quickly without leaving a greasy film. While fermented ingredients can sometimes feed certain skin yeasts, the risk is low compared with heavier plant oils.
Suitable for acne-prone skin in most cases.
Those dealing with severe fungal acne may wish to monitor how their skin responds since some fermentation by-products can act as a food source for Malassezia species.
Summary
Bacillus/Monascus/Zizyphus Jujuba Fruit/Soybean Ferment Filtrate works as an antioxidant, skin conditioner and mild emollient. Fermentation breaks soy and jujube into amino acids, peptides and polyphenols that neutralize free radicals, boost hydration and leave a soft flexible finish. It is still a niche ingredient found mainly in K-beauty style masks serums and light lotions but its gentle multitasking nature is helping it gain traction.
Safety data show a low irritation profile with the main caution being possible soy or fruit allergies. Overall it is considered safe for daily use. As with any new skincare ingredient, patch testing is wise before applying a product to your full face or body.