Lactobacillus/Rosa Rugosa Fruit Ferment Extract 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: July 1, 2025
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We verify all information on this page using publicly available nomenclature standards from The Personal Care Products Council (PCPC), the European Commission's CosIng database and documentation provided directly by ingredient manufacturers. Our analysis is based on technical data from these sources to ensure accuracy and reliability.

What Is Lactobacillus/Rosa Rugosa Fruit Ferment Extract Filtrate?

Lactobacillus/Rosa Rugosa Fruit Ferment Extract Filtrate comes from the petals and hips of the Rosa rugosa shrub, a hardy wild rose celebrated for its high content of natural sugars, vitamin C and polyphenols. These nutrients become even more skin friendly after the fruit is fermented with the probiotic bacterium Lactobacillus. During fermentation the bacteria break down large plant molecules into smaller compounds and release beneficial metabolites like lactic acid and peptides. The mixture is then carefully filtered, leaving a clear liquid rich in water-binding humectants and soothing antioxidants.

Fermented botanicals started gaining attention in Korean beauty labs in the early 2000s when formulators noticed that microbes could unlock new skin benefits from traditional plant extracts. Rosa rugosa joined the trend thanks to its robust antioxidant profile and gentle aroma, and today the filtrate is made in modern facilities that control temperature, pH and fermentation time to achieve consistent quality.

You will spot this ingredient in lightweight serums, hydrating toners, sheet masks, calming moisturizers and multi-step anti aging treatments that aim to boost moisture levels and support a healthy skin barrier.

Lactobacillus/Rosa Rugosa Fruit Ferment Extract Filtrate’s Cosmetic Benefits/Uses

This fermented rose filtrate adds two key functions to a formula that translate into noticeable skin benefits

  • Humectant – attracts water from the environment and draws it into the upper layers of the skin helping to keep the complexion plump comfortable and less prone to fine lines caused by dryness
  • Skin Conditioning – delivers soothing antioxidants and gentle acids that can smooth texture support the skin’s natural microbiome and leave the surface feeling soft and refreshed

Who Can Use Lactobacillus/Rosa Rugosa Fruit Ferment Extract Filtrate

This fermented rose filtrate is generally well tolerated by most skin types. Dry and dehydrated skin benefit most from its water attracting action while normal and combination skin appreciate the light soothing feel. Oily or acne prone skin can also use it because the ingredient does not clog pores and it absorbs quickly without leaving residue. Extremely reactive or rose-allergic individuals may wish to avoid it because even trace aromatic compounds could trigger redness or itchiness.

The material is created from plant fruit and probiotic bacteria so it contains no animal derived components. That makes it suitable for both vegans and vegetarians provided the rest of the formula also meets their criteria.

No data suggest specific issues for pregnant or breastfeeding women when the filtrate is applied topically at cosmetic levels. This text is not medical advice though and anyone who is expecting or nursing should clear every new skincare product with a qualified physician just to be safe.

The ingredient is not known to cause photosensitivity. Daily sunscreen is still a smart habit for overall skin health but you do not need extra sun precautions solely because of this ferment.

Potential Side Effects/Adverse Reactions

Reactions to topical Lactobacillus/Rosa Rugosa Fruit Ferment Extract Filtrate differ from person to person. The points below list potential side effects yet most users experience none when the ingredient is formulated and used correctly.

  • Mild transient tingling
  • Temporary redness or warmth on very sensitive skin
  • Allergic rash in individuals sensitive to rose botanicals
  • Contact dermatitis if combined with other irritating actives in the same routine
  • Eye stinging if the product accidentally gets into the eyes

If any discomfort or visible irritation develops discontinue use and seek advice from a healthcare professional.

Comedogenic Rating

Rating: 0 / 5

Lactobacillus/Rosa Rugosa Fruit Ferment Extract Filtrate is a water-based humectant with virtually no oils, waxes or heavy fatty acids that could sit in pores. Its molecules are small, lightweight and readily absorbed, so they rinse or evaporate instead of forming an occlusive film. For these reasons formulators consider it non-comedogenic.

Suitable for acne-prone or breakout-prone skin.

If the finished product also contains richer emollients, the overall formula could still feel heavy, but the ferment itself poses minimal clogging risk.

Summary

Lactobacillus/Rosa Rugosa Fruit Ferment Extract Filtrate works as a humectant and skin-conditioning agent. The Lactobacillus fermentation process breaks down rose fruit nutrients into smaller compounds like lactic acid and peptides that pull water into the skin, soothe surface irritation and provide antioxidant support. This keeps the complexion hydrated, comfortable and visibly smoother.

While not as famous as hyaluronic acid or green tea, the ingredient enjoys steady popularity in K-beauty inspired toners, essences and calming serums where a light feel and microbiome-friendly profile are valued.

Topical use at cosmetic levels is considered very safe with few reports of irritation except in those sensitive to rose extracts. As with any new skincare product it is wise to do a small patch test first to check personal tolerance.

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