What Is Bacillus/Prunus Yedoensis Flower Extract/Glycerin Ferment Filtrate?
Bacillus/Prunus Yedoensis Flower Extract/Glycerin Ferment Filtrate is a fermented blend made from the blossoms of Prunus yedoensis, better known as the Yoshino cherry tree. The flowers are submerged in glycerin, a plant-derived humectant, and then introduced to a safe strain of Bacillus bacteria. Over several days the bacteria break down the flower material, releasing skin-friendly sugars, amino acids and antioxidants into the glycerin base. After filtration the result is a lightweight liquid packed with moisture-binding and skin-soothing compounds.
The idea of using cherry blossoms in beauty care traces back to traditional Japanese bath rituals where petals were steeped in water for their softening effect. Modern K-beauty labs adopted the concept, turning to fermentation to amplify the flowers’ benefits while improving skin absorption. Today this filtrate shows up in many leave-on products because it offers hydration without heaviness.
You will most often find it in hydrating toners, essence lotions, sheet masks, lightweight gel moisturizers, soothing after-sun products and anti-aging serums designed to maintain a plump fresh look.
Bacillus/Prunus Yedoensis Flower Extract/Glycerin Ferment Filtrate’s Cosmetic Benefits/Uses
This ingredient supports healthy looking skin in several ways
- Humectant: Attracts water from the environment and draws it into the upper layers of the skin which helps keep the complexion looking dewy and supple and can reduce the appearance of fine lines caused by dryness
- Skin Conditioning: Supplies amino acids and antioxidant molecules that can smooth rough texture calm temporary redness and leave skin feeling softer and more resilient
- Skin Protecting: Forms a light invisible film that helps defend against daily pollutants and limits moisture loss so skin stays comfortable throughout the day
Who Can Use Bacillus/Prunus Yedoensis Flower Extract/Glycerin Ferment Filtrate
This ferment filtrate is lightweight and water based so it suits most skin types including oily, combination, normal and dry. Its humectant action adds moisture without leaving a greasy film which makes it friendly for acne prone skin as well. Sensitive complexions usually tolerate it because it contains no added fragrance or harsh solvents, though anyone with a known allergy to cherry blossom or other Rosaceae plants should be cautious.
The blend is entirely plant derived and produced through bacterial fermentation, with no animal sourced components or by-products, so it meets vegan and vegetarian standards.
No studies show any hormonal or systemic activity so products featuring this ingredient are generally considered safe for pregnant or breastfeeding women. That said this is not medical advice and those who are pregnant or nursing should always confirm new skincare with their doctor.
The filtrate does not make skin more reactive to sunlight and has no known photosensitising compounds. Standard daytime sun protection is still advised because UV rays remain the main driver of skin ageing.
It layers well with most actives such as niacinamide, peptides and gentle exfoliating acids and can be used morning or night.
Potential Side Effects/Adverse Reactions
Responses to topical Bacillus/Prunus Yedoensis Flower Extract/Glycerin Ferment Filtrate differ from person to person. The points below list potential but uncommon reactions. When the ingredient is formulated correctly the average user should not experience these issues.
- Mild redness or warmth shortly after application
- Transient stinging on very compromised or freshly exfoliated skin
- Allergic contact dermatitis in individuals sensitive to cherry blossom derivatives
- Small acne like bumps if combined with oils that clog pores in the same formula
- Interaction-related irritation when layered with highly acidic products at the same time
If any of these reactions occur stop using the product and seek advice from a qualified healthcare provider or dermatologist.
Comedogenic Rating
Rating: 0 / 5
This ferment filtrate is almost entirely water and glycerin with tiny amounts of cherry blossom metabolites. None of these components have a known tendency to block pores so the ingredient is considered non-comedogenic. It is therefore suitable for people who are prone to acne or frequent breakouts. Because the filtrate is light and absorbs quickly, it is unlikely to trap oil or dead skin cells underneath.
The only time clogged pores might occur is when the filtrate is blended with heavy oils or waxes in the same formula, so the overall product texture matters more than the filtrate itself.
Summary
Bacillus/Prunus Yedoensis Flower Extract/Glycerin Ferment Filtrate acts as a humectant, skin conditioner and skin protectant. The fermentation process breaks the cherry blossom petals into smaller molecules that bind water, feed the skin with amino acids and antioxidants and leave behind a sheer film that slows moisture loss. All three perks work together to keep the complexion plump, smooth and comfortable.
While not yet a household name, this ferment shows up more and more in K-beauty toners, essences and gel creams thanks to its weightless feel and gentle hydration. Formulators like it because it pairs well with popular actives such as niacinamide or peptides without causing instability.
Current research and user reports point to a high safety profile with low risk of irritation or clogged pores. As with any new skincare ingredient it is wise to patch test first to make sure your skin agrees with it.