What Is Bacillus/Monascus/Prunus Tomentosa Fruit/Soybean Ferment Filtrate?
Bacillus/Monascus/Prunus Tomentosa Fruit/Soybean Ferment Filtrate is a mouthful that simply refers to a fermented blend of soybeans and Prunus tomentosa fruit, processed with two friendly microbes, Bacillus and Monascus. During fermentation the microorganisms break down proteins, sugars and fats in the plant materials into smaller, more skin-friendly molecules such as peptides, amino acids and antioxidants. The resulting liquid, or filtrate, is then separated from any solids and refined for use in skincare.
Fermentation has been valued in East Asian beauty rituals for centuries, but modern cosmetic labs embraced it in the last couple of decades after studies showed fermented plant extracts could be gentler and more potent than their raw forms. This particular filtrate took shape as formulators searched for natural multitaskers that moisturize, soften and protect skin at the same time.
You will most often spot it in hydrating essences, anti-aging serums, sheet masks, lightweight lotions and soothing after-sun products. Because it is water based it slips easily into both simple and high-tech formulas without weighing them down.
Bacillus/Monascus/Prunus Tomentosa Fruit/Soybean Ferment Filtrate’s Cosmetic Benefits/Uses
Here is what this fermented filtrate can do when blended into your skincare:
- Antioxidant: Helps neutralize free radicals created by UV light and pollution which can lead to dullness and early wrinkles. This protective boost supports a healthier looking complexion over time
- Skin conditioning: Supplies skin-loving peptides, sugars and amino acids that hydrate, smooth and improve overall texture so skin feels softer and looks more even
- Emollient: Forms a light, breathable film that reduces transepidermal water loss and leaves skin with a supple finish without a greasy feel
Who Can Use Bacillus/Monascus/Prunus Tomentosa Fruit/Soybean Ferment Filtrate
This fermented filtrate is gentle enough for most skin types, including normal, dry, combination, oily and sensitive skin. Its lightweight emollient action adds softness without clogging pores, which makes it a friendly option for those prone to breakouts. The only group that may need caution is anyone with a known allergy to soy or stone fruits since trace proteins from the source materials could remain in the final blend.
The ingredient is produced from plants and microorganisms with no animal-derived additives, so it aligns with vegan and vegetarian values.
No data shows that the filtrate poses special risks to pregnant or breastfeeding women. Still, this is not medical advice and anyone who is expecting or nursing should run all skincare choices past a qualified health professional to stay on the safe side.
Bacillus/Monascus/Prunus Tomentosa Fruit/Soybean Ferment Filtrate does not increase photosensitivity. You can comfortably use it in morning or evening routines alongside sunscreen during the day.
Potential Side Effects/Adverse Reactions
Responses to topical ingredients differ from person to person. The points below outline potential side effects, but they are uncommon when the filtrate is used at cosmetic levels in a well-formulated product.
- Allergic reaction Minor swelling, itching or hives may appear in individuals sensitive to soy, fermented ingredients or stone fruits
- Contact dermatitis Red, irritated patches can occur if the skin barrier is already compromised or if the product contains additional irritants
- Temporary flushing or warmth A mild, short-lived warming sensation may happen as the active peptides stimulate surface circulation
- Eye irritation Stinging or watering is possible if the product accidentally gets into the eyes
If any of these reactions develop, stop using the product and seek help from a healthcare professional if symptoms persist or worsen.
Comedogenic Rating
Rating: 1/5
The filtrate is largely water based with mainly small peptides, sugars and antioxidants so it has very little potential to block pores. While soy fermentation can leave trace lipids, they appear in tiny amounts and are not the heavy, waxy kinds that usually cause congestion. For this reason it sits at a low 1 out of 5 on the comedogenic scale.
That makes it suitable for skin prone to acne or frequent breakouts.
Keep in mind that overall pore friendliness also depends on the full product formula and how often you layer occlusive ingredients on top.
Summary
Bacillus/Monascus/Prunus Tomentosa Fruit/Soybean Ferment Filtrate works as an antioxidant, skin conditioner and light emollient. Fermentation breaks down soybean and cherry fruit compounds into smaller molecules that soak in easily, shield the skin from free radicals and leave a soft hydrated feel without heaviness.
Though not as famous as green tea or niacinamide, this fermented blend has been gaining quiet popularity in Korean and Japanese inspired skincare where consumers look for gentle multitaskers.
Current safety data is reassuring with only rare reports of allergy in people sensitive to soy or stone fruits. As with any new ingredient it is wise to patch test a fresh product first to make sure your skin agrees with it.