Tremella (Tremella fuciformis)
87.76% hyaluronic acid by mass
Galla and colleagues tested a Tremella extract using NMR spectroscopy, ATR-FTIR, and MALDI-TOF mass spectrometry in 2025 and found it contained 87.76% hyaluronic acid with molecular weight exceeding 2,000 kDa, structurally comparable to pharmaceutical HA.
Galla et al., Foods, 2025
Nrf2/Keap1
the cellular pathway Tremella activates to stimulate collagen I, elastin, and HA synthesis in human dermal fibroblasts (Fu et al., 2021)
43 proteins
differentially expressed skin proteins in aging mice treated with Tremella polysaccharides in 2024 iTRAQ proteomics study (Xu et al., 2024)
86% cheaper
than pharmaceutical hyaluronic acid at equivalent moisturizing effect, based on market pricing comparisons (Wu et al., 2019)
Galla et al., Foods, 2025
View as image ↗Most mushroom beauty claims are backed by supplement brand blogs and lifestyle publications. The same claims about Tremella (that it hydrates skin, supports collagen, and functions like hyaluronic acid) are backed by peer-reviewed research published in dermatology journals, food science journals, and molecular biology journals by researchers with no supplement products to sell.
That is the fundamental difference between Tremella and most beauty mushroom marketing. The science exists. The question is what it shows and where it stops; this article works through both.
For the full overview of Tremella including its biology, traditional use history, and full benefit profile, see What Is Tremella Mushroom? The Beauty Mushroom Explained.
Key Takeaways
- Mineroff and Jagdeo's 2023 review in Archives of Dermatological Research (a peer dermatology journal, not a supplement publication) documented Tremella's roles in skin hydration, barrier support, photoprotection, and wound healing biology
- Galla et al. 2025 (Foods) confirmed via NMR spectroscopy and mass spectrometry that Tremella extract contains 87.76% hyaluronic acid at molecular weight above 2,000 kDa, structurally comparable to pharmaceutical HA
- Fu et al. 2021 showed that Tremella polysaccharides protect human dermal fibroblasts from UV damage by activating Nrf2/Keap1 pathways, increasing collagen I, elastin, and HA content
- Xu et al. 2024 found 43 differentially expressed proteins in aging mouse skin treated with Tremella polysaccharide via iTRAQ proteomics, covering cellular metabolism, immune response, and structural proteins
- Xie et al. 2022 demonstrated Tremella polysaccharides alleviated atopic dermatitis in mice by normalizing the Th1/Th2 cytokine imbalance and reducing serum IgE, extending the evidence beyond moisturizing to anti-inflammatory skin modulation
- No head-to-head human clinical trial comparing Tremella to hyaluronic acid in skin hydration has been published; Mineroff 2023 explicitly called for more human trials
Why Academic Dermatologists Reviewed Tremella in 2023
Most mushroom supplement coverage comes from two sources: brand content from companies that sell the product, and general wellness publications that aggregate the brand content. Neither has the critical independence to note when the evidence is limited.
In 2023, Mineroff and Jagdeo published a review of Tremella's potential cutaneous benefits in Archives of Dermatological Research.[1] Archives of Dermatological Research is a peer-reviewed clinical dermatology journal. Mineroff is a dermatology researcher. This is the kind of review that appears when a compound has enough credible primary evidence that academic scientists find it worth summarizing; not when brands are pushing a story.
The review documented evidence for four skin-relevant categories: hydration and barrier support, photoprotection, wound healing biology, and anti-inflammatory effects. The authors specifically called for more human clinical trials, which is an honest acknowledgment that most of the evidence at that point was preclinical.
The significance of this review is not that it proves Tremella works. It is that independent academic dermatologists found the primary research credible enough to synthesize and present to a clinical audience. That is a different quality of validation than a supplement company publishing its own literature review.
What Galla 2025 Found: Not "Like" Hyaluronic Acid, but Actual HA
The most common claim about Tremella is that its polysaccharides behave like hyaluronic acid. Galla and colleagues' 2025 study in Foods produced a more specific finding than that.[2]
Galla's team applied three analytical methods to a Tremella fuciformis extract: ATR-FTIR spectroscopy (a technique that identifies chemical functional groups by how they absorb infrared light), NMR spectroscopy (which maps molecular structure based on atomic magnetic properties), and MALDI-TOF mass spectrometry (which measures molecular weight and identifies polymers). All three methods pointed to the same conclusion: the extract contained 87.76% hyaluronic acid with a molecular weight above 2,000 kDa.
Why does molecular weight matter? Hyaluronic acid in the skin exists naturally at high molecular weight. High-MW HA forms the extracellular matrix structure that retains water and supports tissue integrity. Lower-MW HA is more commonly found in synthetic supplements because it is easier to produce at scale. The Galla finding is that the Tremella-derived HA is naturally high molecular weight: the form more closely matching what the skin uses structurally.
Wu and colleagues' 2019 review in the International Journal of Biological Macromolecules had already documented that Tremella polysaccharides function as effective skin moisturizers at approximately 86% lower cost than conventional HA preparations at equivalent moisturizing effect.[3] Galla 2025 provides the structural chemistry confirmation for why that equivalence holds: it is not just functional similarity, it is chemical identity.
The practical implication for cosmetic formulation is significant. Non-animal hyaluronic acid derived from Tremella represents an alternative to bacterial fermentation-derived HA (the current dominant production method) with a potentially favorable high-molecular-weight profile.
The Nrf2/Keap1 Mechanism: How Tremella Tells Skin Cells to Make More Collagen
Knowing that Tremella functions like HA in moisturizing applications is useful. Understanding the cellular mechanism that drives collagen and elastin production is more useful for understanding what the compound is actually doing in skin tissue.
Fu and colleagues published the key experiment in the Journal of Cosmetic Dermatology in 2021.[4] They exposed human dermal fibroblasts (the cells in the skin's dermis that produce structural proteins) to UVA radiation and measured what happened with and without Tremella polysaccharide pretreatment.
UVA radiation causes oxidative damage to skin cells that degrades collagen and elastin and disrupts the fibroblast's ability to produce new structural proteins. The mechanism involves free radical production that activates stress pathways and suppresses the Nrf2 transcription factor.
Nrf2 (nuclear factor erythroid 2-related factor 2) is the cell's antioxidant master switch. Normally it is held inactive by a protein called Keap1. When oxidative stress is detected, Nrf2 detaches from Keap1, moves into the cell nucleus, and activates antioxidant defense genes. It also upregulates synthesis of collagen I, elastin, and hyaluronic acid.
Fu's team found that Tremella polysaccharide pretreatment significantly increased collagen I, elastin, and HA content in UVA-exposed fibroblasts compared to untreated exposed cells. The mechanism: TFPS (Tremella fuciformis polysaccharides) upregulated the Nrf2/Keap1 pathway, activating its antioxidant and structural protein synthesis functions. In plain terms: Tremella turned on the cellular machinery that makes the proteins keeping skin firm and hydrated, specifically under the oxidative conditions that daily sun exposure creates.
This is not a speculative mechanism or a marketing claim. It is a cell-level experiment with identified molecular targets and quantified protein output.
For the complete picture of how Tremella affects collagen specifically, see Tremella and Collagen Production: Can It Reverse Skin Aging?.
The 2024 Proteomics Study: When 43 Proteins Change at Once
Most mechanistic skin research identifies one or two pathways. Xu and colleagues' 2024 study in Molecules took a wider-angle approach using a technology called iTRAQ proteomics.[5]
iTRAQ (isobaric tags for relative and absolute quantitation) is a mass spectrometry technique that compares protein expression levels across tissue samples simultaneously. Rather than measuring one target protein at a time, it measures thousands of proteins in parallel and identifies which ones changed expression in the experimental condition.
Xu's team induced skin aging in mice using D-galactose (a standard laboratory model for oxidative aging) and then treated animals with NTP, a Tremella heteromannan polysaccharide with a molecular weight of 3.6 million daltons. They then ran iTRAQ proteomics on skin tissue samples.
The results showed 43 differentially expressed proteins between the treated aging group and the untreated aging control. These proteins covered cellular metabolism (mitochondrial energy pathways), immune response (cytokine-related proteins), and structural proteins (extracellular matrix components). The treated group also showed reduced hydroxyproline loss (hydroxyproline is a marker of collagen content), preserved skin HA levels, and decreased oxidative stress markers.
The significance of 43 DEPs is that skin aging is not a single-pathway problem. It is a coordinated decline across metabolism, immune function, and structural maintenance. A compound that produces measurable changes in 43 proteins simultaneously is engaging the system more broadly than a single-target moisturizer would. Whether this translates into meaningful clinical outcomes in humans requires human trials, but the biological signal is deeper than what most skin ingredients produce in comparable studies.
Beyond Moisturizing: The Atopic Dermatitis Evidence
Moisturizing and anti-aging are the primary categories where Tremella gets discussed. The 2022 study by Xie and colleagues in Frontiers in Pharmacology extends the evidence into an entirely different application: inflammatory skin disease.[6]
Atopic dermatitis (eczema) is driven by an immune imbalance: specifically, an excess of Th2-type immune responses relative to Th1-type responses. This imbalance causes elevated IgE antibodies, increased mast cell activity, and the characteristic itch-scratch cycle of eczema. It is not a moisturizing problem in origin; it is an immune regulation problem.
Xie's team used a murine model of atopic dermatitis and treated with Tremella polysaccharides. The treatment reduced serum IgE (the antibody most directly linked to allergic skin responses), normalized the Th1/Th2 cytokine imbalance, reduced inflammatory markers, and improved gut microbiota diversity. Skin barrier score improved alongside the immune changes.
This matters for the beauty science story in two ways. First, it demonstrates that Tremella's skin effects are not limited to moisturizing. The compound is engaging immune signaling pathways relevant to skin health in a way that suggests therapeutic potential beyond cosmetics. Second, the gut microbiota finding connects to a separate body of evidence: Tremella polysaccharides act as prebiotics, and gut microbiome composition is increasingly recognized as a factor in skin inflammation. The mechanism here involves SCFA (short-chain fatty acid) production from polysaccharide fermentation in the gut, which modulates systemic immune tone.
For more on how mushroom polysaccharides affect the microbiome, see Mushroom Polysaccharides and Microbiome Nourishment.
Where Tremella Stands Across the Broader Mushroom Beauty Literature
Paterska and colleagues' 2024 review in Nutrients surveyed 52 publications covering macrofungal extracts as sources of anti-aging cosmetic ingredients.[7] Tremella fuciformis emerged as a top species across multiple categories: moisturizing effects comparable to reference compounds, documented inhibition of collagen and elastin degradation, antioxidant activity, and photoprotective effects.
This positioning across a 52-publication comparative review is meaningful. It means Tremella is not just well-studied in isolation. Compared to other mushrooms evaluated for skin applications, it performs at the front of the field.
Wu et al.'s 2019 review across Tremella polysaccharide applications documented the structure and composition in detail: a glucuronoxylomannan backbone with molecular weight ranging from 8,000 to 6 million daltons depending on processing conditions, composed primarily of mannose (32–45%), glucuronic acid (13–25%), fucose (13–20%), and xylose (15–18%). This anionic (negatively charged) polysaccharide structure contributes to its water-binding capacity and explains why the moisturizing mechanism works at a physical chemistry level, not just a biological one.[3]
For a deep dive on how Tremella's polysaccharide structure compares to other mushroom species, see Tremella Bioactive Compounds: Polysaccharides and Their Unique Properties. And for context on how Tremella is used in traditional Chinese medicine, where its beauty properties have been documented for over 1,000 years, see Snow Fungus in Traditional Chinese Medicine: 1,000+ Years of Use.
The Honest Assessment: What the Research Has and Hasn't Shown
The science behind Tremella's skin claims is more substantial than the science behind most beauty mushroom ingredients. That is the honest answer to whether the research is real.
The mechanisms documented in the research are: HA-equivalent moisturizing chemistry (Galla 2025), Nrf2/Keap1-mediated collagen and elastin synthesis in UV-exposed human cells (Fu 2021), broad proteome changes in aging skin (Xu 2024), and atopic dermatitis alleviation through Th1/Th2 normalization (Xie 2022). These are peer-reviewed findings in credible journals by independent researchers.
What the research has not produced: a randomized controlled trial testing Tremella topical application versus hyaluronic acid in human subjects measuring skin hydration by standard methods. Mineroff and Jagdeo's 2023 review, while validating the existing evidence, explicitly called for more human trials. The gap between what cells and mice show and what human skin shows under controlled conditions is the standard gap in preclinical research, and Tremella has not fully bridged it yet.
What this means practically: the mechanistic case for Tremella in skin care is stronger than its human clinical evidence base. Researchers have identified why it should work. Demonstrating exactly how much it works in humans, under what conditions, at what doses, requires the human trials that have not been published yet.
For the full pharmacology picture across all Tremella mechanisms (not just skin), including the cognitive RCT and the blood sugar trial, see The Pharmacology of Tremella fuciformis: How It Works. For the broader question of whether mushroom skincare products deliver on their claims across species, see Do Mushroom Skincare Products Actually Work? Research Review.
The Bottom Line
The beauty science behind Tremella fuciformis is real and independently documented. Mineroff and Jagdeo (Archives of Dermatological Research, 2023) reviewed the evidence and found documented roles in hydration, photoprotection, and wound healing biology. Galla et al. (Foods, 2025) confirmed 87.76% HA content at above 2,000 kDa molecular weight via NMR and mass spectrometry. Fu et al. (2021) demonstrated the Nrf2/Keap1 mechanism producing collagen I, elastin, and HA in UV-exposed human dermal fibroblasts. Xu et al. (2024) found 43 differentially expressed proteins in aging skin with iTRAQ proteomics. The gap: no head-to-head human clinical trial versus HA exists yet, and the Mineroff review explicitly called for more human studies.
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