What Is Hydrolyzed Aspergillus/Brassica Napus Seed Ferment Filtrate Extract?
Hydrolyzed Aspergillus/Brassica Napus Seed Ferment Filtrate Extract comes from rapeseed (Brassica napus) that has been fermented with the helpful mold Aspergillus. During fermentation the seeds break down and release proteins, peptides and sugars that are then filtered and further hydrolyzed into smaller, skin-friendly pieces. This process creates a lightweight liquid packed with conditioning molecules that are easy for skin to accept.
Fermentation has long been used in food and skincare to boost the potency of plant materials. As Korean beauty trends popularized fermented extracts in the early 2000s, chemists explored rapeseed because it is rich in amino acids and antioxidants. Once its skin-softening ability was confirmed the extract began to show up in mainstream formulas.
To make the ingredient manufacturers clean and crush rapeseed, add a culture of Aspergillus, let the mix ferment under controlled heat and humidity, then filter out solids. The clear solution is hydrolyzed with enzymes or gentle acids to cut large molecules into smaller fragments that can sink into skin. Finally the liquid is purified and stabilized for cosmetic use.
You will usually spot Hydrolyzed Aspergillus/Brassica Napus Seed Ferment Filtrate Extract in leave-on products that aim to hydrate and smooth such as toners, essences, sheet masks, daily moisturizers, anti-aging serums, eye creams and soothing after-sun gels. It can also appear in wash-off masks and gentle cleansers where it adds a conditioning touch.
Hydrolyzed Aspergillus/Brassica Napus Seed Ferment Filtrate Extract’s Cosmetic Benefits/Uses
This fermented rapeseed extract is prized for one main action in skincare.
Skin conditioning: The small peptides and sugars left after fermentation form a thin, invisible film that helps skin hold water, leaving it feeling softer and smoother. Regular use can improve overall texture, reduce rough spots and give the complexion a healthy-looking glow.
Who Can Use Hydrolyzed Aspergillus/Brassica Napus Seed Ferment Filtrate Extract
This fermented rapeseed filtrate is gentle enough for most skin types, including oily, dry, combination and even reactive or easily irritated complexions. It is lightweight and water based so it will not leave a greasy feel or clog pores, making it a friendly option for acne-prone skin as well. The only group that may need extra caution is anyone with a known allergy to rapeseed, mustard or other members of the Brassica plant family, as trace proteins could in theory trigger a reaction.
The ingredient is sourced entirely from plants and microorganisms with no animal derivatives or by-products, so it is suitable for both vegans and vegetarians.
Current research does not indicate any specific risks for pregnant or breastfeeding women when this extract is applied topically. Still, this is not medical advice and anyone who is expecting or nursing should run any skincare product they use past a doctor just to be on the safe side.
Hydrolyzed Aspergillus/Brassica Napus Seed Ferment Filtrate Extract does not increase photosensitivity and can be used morning or night without raising the risk of sunburn. As with any new ingredient, introduce it slowly alongside other actives to watch how your skin responds.
Potential Side Effects/Adverse Reactions
Side effects and reactions to the topical application of Hydrolyzed Aspergillus/Brassica Napus Seed Ferment Filtrate Extract can vary from person to person. The points below list potential issues, but they are uncommon and most users will not experience them when the ingredient has been correctly formulated into a product.
- Mild stinging or redness on very sensitive skin
- Temporary itching or tightness if applied to broken or compromised skin
- Allergic contact dermatitis in individuals allergic to rapeseed or related plants
- Rare cross-reaction for people with mold sensitivities
If any of these reactions occur stop using the product and consult a healthcare professional for personalized guidance.
Comedogenic Rating
Rating: 0/5 (non-comedogenic)
This extract is water based and made up of small peptides and sugars that do not clog pores or leave an occlusive film. It absorbs quickly without adding oil, so it is unlikely to trap dead skin cells or bacteria that can spark breakouts.
Because of its zero rating it is generally suitable for acne-prone or congestion-prone skin. The only caveat is any personal allergy to rapeseed or molds which is unrelated to pore clogging.
No studies or user reports link this ingredient to increased blackheads or whiteheads, even when used in layered routines common in K-beauty.
Summary
Hydrolyzed Aspergillus/Brassica Napus Seed Ferment Filtrate Extract is mainly a skin conditioning agent. Fermentation and hydrolysis break rapeseed proteins into tiny peptides and sugars that sit on the surface to bind water, soften rough patches and give a smoother, healthier look.
While not yet as famous as hyaluronic acid or niacinamide it is gaining traction in essences, serums and sheet masks thanks to the continuing buzz around fermented ingredients. Brands that favor gentle or vegan formulas often turn to it for lightweight hydration.
Overall safety is high with low irritancy, no known toxicity and a non-comedogenic profile. Still, everyone’s skin is different so patch testing any new product that contains this extract is a smart habit.