What Is Neolentinus Lepideus/Stachys Japonica Root Extract Ferment Filtrate?
Neolentinus Lepideus/Stachys Japonica Root Extract Ferment Filtrate comes from the roots of Stachys japonica, a herb traditionally valued in East Asia. The roots are first soaked in a solvent, usually water and glycerin, to pull out their natural goodness. This raw extract is then introduced to Neolentinus lepideus, a fungus related to the shiitake mushroom family. During fermentation the microorganism breaks down large plant molecules into smaller compounds such as amino acids, peptides, sugars and organic acids that are more skin friendly. Once the process is complete the mixture is carefully filtered, leaving a clear fluid rich in nutrients and mild aromatic compounds.
Fermented plant extracts rose to fame through Korean beauty trends that prized ingredients able to deliver high potency with low irritation. Brands began turning to mushrooms for their enzymes, which help unlock extra benefits from plant material. As a result this filtrate has found its way into modern skin care aimed at hydration and barrier support.
You will most often spot Neolentinus Lepideus/Stachys Japonica Root Extract Ferment Filtrate in leave-on products such as serums, essence lotions, sheet masks, soothing gels, lightweight moisturizers and anti aging creams where it can sit on the skin long enough to do its work.
Neolentinus Lepideus/Stachys Japonica Root Extract Ferment Filtrate’s Cosmetic Benefits/Uses
This fermented filtrate offers multiple skin care perks that make it a handy addition to many formulas.
- Skin conditioning: The blend of amino acids, peptides and sugars helps maintain soft smooth skin. It supports the moisture barrier so skin feels less tight and looks more supple
- Emollient: Its lightweight film cushions the surface filling in tiny gaps between skin cells. This leaves a silky finish and can boost the spreadability of creams and lotions
Who Can Use Neolentinus Lepideus/Stachys Japonica Root Extract Ferment Filtrate
This ferment filtrate is generally well tolerated by all skin types including dry, normal, combination and oily skin because it is lightweight and water based. Sensitive skin can usually handle it since fermentation tends to lower the pH and break down potential irritants, though extremely reactive skin should still watch for any new redness or warmth. It is unlikely to clog pores so acne-prone users may also benefit from its barrier support and light hydration.
The ingredient is derived entirely from plant roots and a non-animal fungus so it is suitable for both vegetarians and vegans. No animal-derived processing aids are typically involved in its manufacture.
Current safety data show no specific concerns for women who are pregnant or breastfeeding when the filtrate is applied to intact skin in the low concentrations found in cosmetics. This is informational only and not medical advice; anyone who is pregnant or nursing should review all skincare choices with their healthcare provider to be extra safe.
Neolentinus Lepideus/Stachys Japonica Root Extract Ferment Filtrate is not known to cause photosensitivity, so it will not make skin more prone to sunburn. Standard daytime sun protection should still be followed with or without this ingredient.
Potential Side Effects/Adverse Reactions
Individual responses to topical Neolentinus Lepideus/Stachys Japonica Root Extract Ferment Filtrate can vary. The following lists potential side effects that might occur, although most people will not experience any of them when the ingredient is formulated and used correctly.
- Allergic reaction – itching, swelling or hives in those who are sensitive to mushroom or plant-based ferments
- Contact dermatitis – localized redness or rash due to irritation from the ferment or other formula components
- Stinging or burning – transient discomfort on very compromised or freshly exfoliated skin
- Acne-like breakouts – rare congestion in users extremely prone to fungal acne as some ferments may influence the skin’s microbiome
- Product spoilage-related irritation – if a formula is contaminated or past its shelf life the degraded ingredients can trigger skin upset
If any persistent irritation or unexpected reaction occurs stop using the product and consult a qualified healthcare professional.
Comedogenic Rating
Rating: 0–1 out of 5. This filtrate is water based and contains mainly low-molecular-weight amino acids, sugars and peptides with virtually no heavy oils or waxes that could block pores. Fermentation further reduces the size of any residual plant compounds making them less likely to accumulate inside follicles. In most finished formulas the ingredient is used at low percentages so its pore-clogging potential is minimal.
Suitable for acne-prone or breakout-prone skin.
As always the overall comedogenicity of a product depends on the entire ingredient list so consider how this ferment sits alongside richer emollients or occlusives in the same formula.
Summary
Neolentinus Lepideus/Stachys Japonica Root Extract Ferment Filtrate acts as a skin-conditioning and emollient agent. Fermentation breaks down Stachys japonica root constituents into skin-friendly amino acids, peptides and sugars that attract water and reinforce the moisture barrier while leaving a soft silky finish.
The ingredient enjoys moderate popularity, mainly in K-beauty inspired serums, essences and lightweight moisturizers where brands look for gentle barrier support without heaviness.
Current data show it is generally safe for all skin types with a very low risk of irritation or comedogenicity when used at cosmetic levels. As with any new skincare product it is smart to patch test first to make sure your skin agrees with the full formula.