Bacillus/Zizania Latifolia Ferment Filtrate: What Is It, Cosmetic Uses, Benefits & Side Effects

Curious about this ingredient? In this article we're explaining exactly what it is and why it's used within cosmetic formulations.
Updated on: June 23, 2025
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All information on this page is verified using The Personal Care Products Council's (PCPC) INCI database. Our ingredient analyses are based exclusively on PCPC's technical data to ensure accuracy and reliability.

What Is Bacillus/Zizania Latifolia Ferment Filtrate?

Bacillus/Zizania Latifolia Ferment Filtrate is a liquid ingredient created when the aquatic plant Zizania latifolia, sometimes called wild rice stem, is fermented with the help of Bacillus bacteria. During fermentation the microbes break down the plant’s proteins, sugars and minerals into smaller molecules that skin and hair can readily absorb. This bio-conversion enriches the filtrate with amino acids, peptides and natural humectants that draw in water. The idea of using plant ferments in beauty formulas took hold in East Asian skin care labs looking for gentle yet active alternatives to synthetic additives, and Zizania latifolia proved appealing thanks to its long history as a food and folk remedy.

To make the filtrate, harvested Zizania latifolia is cleaned, mashed and mixed with a selected strain of Bacillus under controlled warmth and pH. After several days the mixture is filtered to remove solids, leaving a clear to amber liquid that is standardized for consistency before being added to products.

You will most often spot Bacillus/Zizania Latifolia Ferment Filtrate in lightweight moisturizers, hydrating toners, sheet masks, leave-in hair conditioners, anti-aging serums and soothing after-sun gels where its water-binding and conditioning traits shine.

Bacillus/Zizania Latifolia Ferment Filtrate’s Cosmetic Benefits/Uses

When blended into a formula this fermented filtrate offers several advantages:

  • Hair conditioning: The amino acids and peptides coat the hair shaft, helping smooth cuticles, improve softness and reduce flyaways which leads to easier detangling and a healthy shine
  • Humectant: Its small sugar and protein fragments attract and hold moisture from the environment so skin feels plumper and better hydrated throughout the day
  • Skin conditioning: The ferment’s nutrients support the skin barrier, calm minor irritation and leave the surface feeling silky which can enhance overall texture and comfort

Who Can Use Bacillus/Zizania Latifolia Ferment Filtrate

This ferment filtrate is gentle and water based so it suits dry, normal, combination, oily and even sensitive skin. Its lightweight texture adds hydration without heavy oils which keeps pores from feeling clogged, making it friendly for acne-prone complexions too. No elements within the ingredient are known to trigger common skin conditions so there are no groups that must automatically avoid it.

Because the filtrate is made from a plant and a bacteria culture with no animal derivatives it is considered vegan and vegetarian friendly.

Current safety data show no issues for people who are pregnant or breastfeeding. Still, this is not medical advice and anyone expecting or nursing should check with a healthcare professional before introducing new skincare.

The ingredient does not increase the skin’s sensitivity to sunlight so there is no added risk of sunburn or pigmentation. It also plays well with most other cosmetic actives which makes it easy to layer in a routine.

Potential Side Effects/Adverse Reactions

Reactions to topical Bacillus/Zizania Latifolia Ferment Filtrate are rare and depend on the individual. The list below covers potential side effects but most users will never encounter them when the ingredient is included at normal cosmetic levels and produced under good manufacturing practices.

  • Mild redness or warmth right after application in very sensitive skin
  • Itching or a light stinging sensation if you have an allergy to rice plants or grass family botanicals
  • Localised rash or hives due to a delayed hypersensitivity reaction to fermentation byproducts
  • Breakouts if the finished product contains occlusive co-ingredients that trap oil and bacteria
  • Irritation on compromised or open skin where any cosmetic could sting
  • Very rare infection risk if a product becomes contaminated and is used past its shelf life

If you notice any of the above while using a product that contains this ferment stop using it right away and seek guidance from a healthcare professional.

Comedogenic Rating

Rating: 0 / 5 (non-comedogenic)

This ferment filtrate is an aqueous liquid with no fatty oils or waxes that could block pores. Its main components are small peptides, sugars and minerals which readily dissolve in water and rinse away cleanly. Nothing in its composition encourages sebum oxidation or buildup so it earns the lowest possible rating.

That means the ingredient is generally suitable for people who are prone to acne or breakouts.

Formulators sometimes combine the filtrate with richer emollients to boost texture; in those finished products any pore clogging would come from the added oils, not the ferment itself.

Summary

Bacillus/Zizania Latifolia Ferment Filtrate acts as a humectant, skin conditioner and hair conditioner. Fermentation turns wild rice stem nutrients into tiny, bioavailable molecules that pull moisture into skin and hair, smooth cuticles and reinforce the surface barrier for softness and comfort.

It is still considered a niche ingredient outside East Asian beauty circles but interest is rising as more brands look for gentle plant ferments to replace synthetic additives.

Current data show it is safe for all skin and hair types with a very low risk of irritation or pore clogging. As with any new cosmetic, do a quick patch test when trying a product that contains this ferment to be on the safe side.

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