What Is Chryseobacterium Sp. Mk-8 Ferment Filtrate?
Chryseobacterium Sp. Mk-8 Ferment Filtrate is a liquid ingredient that comes from fermenting a special strain of the Chryseobacterium family, officially stored at the Korean Culture Center of Microorganisms. During fermentation the bacteria break down nutrients in the growth medium then the finished broth is filtered, leaving behind a clear filtrate rich in skin-friendly compounds such as amino acids, peptides and natural sugars.
The idea of using bacterial ferment filtrates in beauty formulas took off in the early 2000s when researchers noticed that certain fermented liquids helped keep factory workers’ hands soft and hydrated. Since then brands have explored many microbes, including this MK-8 strain, to create gentle moisture boosting ingredients.
Manufacturing starts with a pure seed of Chryseobacterium Sp. Mk-8 grown in a sterile tank filled with water, plant-based sugars and minerals. After several days the culture is pasteurized to kill any remaining cells, then passed through fine filters to remove solids. The resulting filtrate is standardized for purity before it reaches cosmetic labs.
You will usually find Chryseobacterium Sp. Mk-8 Ferment Filtrate in leave-on products that focus on moisture balance or soothing care. Common formats include lightweight facial serums, gel or cream moisturizers, sheet masks, overnight masks and anti-aging lotions aimed at boosting glow and maintaining a smooth skin barrier.
Chryseobacterium Sp. Mk-8 Ferment Filtrate’s Cosmetic Benefits/Uses
This ferment filtrate offers two main functions that improve both product feel and skin appearance.
- Humectant – pulls water from the air and the deeper skin layers to the surface so formulas feel fresh and skin stays plump and hydrated for longer
- Skin conditioning – softens rough patches and supports a healthy barrier which can make skin look smoother brighter and more elastic
Who Can Use Chryseobacterium Sp. Mk-8 Ferment Filtrate
Because it is mainly a water based humectant, Chryseobacterium Sp. Mk-8 Ferment Filtrate suits nearly every skin type. Dry or mature skin tends to feel the greatest benefit from its moisture binding effect, while normal and combination skin can enjoy a light layer of hydration without extra heaviness. Oily or acne prone users usually tolerate it well since it is not greasy, though products that pair the filtrate with rich oils could feel too occlusive for very oily complexions.
The ingredient is derived from a laboratory fermentation of bacteria and contains no animal sourced matter, so it is compatible with vegan and vegetarian lifestyles.
No published data suggest a risk for pregnant or breastfeeding women when the filtrate is used in a topical cosmetic. Still this is not medical advice. Anyone who is pregnant or nursing should review new skin care with a qualified health professional before use just to be safe.
Chryseobacterium Sp. Mk-8 Ferment Filtrate does not increase photosensitivity, so it will not make skin more prone to sunburn. Standard daily sunscreen is still encouraged for overall skin health.
Potential Side Effects/Adverse Reactions
Responses to topical Chryseobacterium Sp. Mk-8 Ferment Filtrate can vary from person to person. The points below outline potential side effects that remain unlikely for most users when the ingredient is properly formulated and preserved.
- Mild redness or transient stinging on very sensitive skin
- Allergic contact dermatitis in individuals allergic to components produced during fermentation
- Itching or small bumps if the product is contaminated or improperly preserved
- Breakouts in acne prone users if the finished formula also contains heavy oils or pore clogging waxes
If any discomfort or visible irritation occurs discontinue use promptly and seek advice from a medical professional or dermatologist.
Comedogenic Rating
Rating: 0 / 5 (non-comedogenic)
Chryseobacterium Sp. Mk-8 Ferment Filtrate is a lightweight water based liquid with no oily lipids, waxes or heavy fatty acids that could lodge in pores. Its primary components are small humectant molecules such as amino acids and sugars which dissolve easily in water and rinse away without residue. Because it lacks occlusive or greasy elements it does not form a film that traps sebum or dead cells, keeping pore blockage risk extremely low.
This makes the filtrate broadly suitable for skin that is prone to acne or breakouts. The only caveat is the rest of the formula: if paired with comedogenic oils the finished product could still clog pores even though the ferment itself does not.
Formulators often choose a non-comedogenic preservative system with this ingredient which further supports its low risk profile.
Summary
Chryseobacterium Sp. Mk-8 Ferment Filtrate works mainly as a humectant and skin conditioning agent. Its naturally occurring amino acids, peptides and sugars attract water into the upper skin layers then help hold it there, leaving the surface softer, smoother and more elastic. By reinforcing moisture balance it indirectly supports the skin barrier which can improve overall texture and luminosity.
Despite the buzz around fermented skincare, this particular strain is still a niche addition so you will mostly spot it in K-beauty serums, gel creams and sheet masks rather than mainstream global lines. Brands that do use it lean on its gentle hydrating effect to market calming glow-boosting formulas.
Current data show the filtrate is very safe for topical use with a low chance of irritation and virtually no comedogenic risk. As with any new cosmetic though it is wise to patch test first, especially if you have sensitive or highly reactive skin.