
Tremella
Tremella fuciformis
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Version 1.0 · Updated: 21 June 2026 · Subject-matter reviewer: Mateusz Rosa, founder of Aloha Fungi, TCM therapist, Doctor of Acupuncture (WFAS), author of books on functional mushroom supplementation.
Tremella in 60 seconds
Tremella is the common name for the mushroom Tremella fuciformis of the Tremellaceae family. The Polish name trzęsak morszczynowaty refers to the resemblance of the branching lobes of the fruiting body to bladderwrack fronds. Chinese yin er (银耳, „silver ear"), Japanese shiro kikurage, English snow fungus, silver ear and white jelly mushroom describe the same lacy, gelatinous structure.
It is a parasitic mushroom growing mainly in the tropical and subtropical zones. In the wild it does not develop directly on wood but as a parasite of other wood-rotting fungi, most often of the genus Annulohypoxylon. The fruiting body has a characteristic lacy, gelatinous structure, translucent and white to yellowish when fresh, hard and pale yellow when dried.
In controlled cultivation Tremella is grown on deciduous wood together with its host fungus, which gives a repeatable TFPS polysaccharide content and full control of contaminants.
The first written mentions of yin er appear in Chinese medical texts from the Tang dynasty (618-907 CE). It was traditionally an imperial mushroom reserved for the court, called „plant caviar". The most famous cosmetic consumer of Tremella in Chinese history was the concubine Yang Guifei (719-756 CE) at the court of Emperor Xuanzong, who, according to the records, ate a yin er dessert daily to maintain her beauty.
In the classic work Ben Cao Gang Mu (1578) Li Shizhen described Tremella as a tonic tonifying the Yin of the Lung and Stomach, generating fluids (Jin Ye), indicated for dry cough, dry skin and exhaustion after a long illness.
The modern renaissance of Tremella in the West began in the 1990s, when Japanese and Korean cosmetics manufacturers started using TFPS polysaccharides as a plant alternative to animal-derived hyaluronic acid.
The main bioactive complex is the TFPS polysaccharides. Structurally this is a glucuronoxylomannan, a linear (1→3)-α-D-mannose chain with side branches of β-D-xylose, α-D-fucose and β-D-glucuronic acid. Molecular weight from 5.82×10⁵ to 3.74×10⁶ Da. Standardised in our extract to above 30%.
β-1,3/1,6-glucans, polysaccharides activating Dectin-1 and TLR4 on dendritic cells, present both as part of the TFPS fraction and as a separate component.
Uridine, a nucleoside described as a regulator of glucocorticoid signalling and support for neuronal membrane synthesis. Mannitol (tremellic acid), a natural polyol with osmotic and free-radical-scavenging properties. Ergosterol and provitamin D₂, fungal sterols. In addition exogenous amino acids (lysine, threonine) and trace elements (zinc, selenium, iron).
Chemical analyses have shown that the polysaccharide fraction of T. fuciformis contains up to 87.76% of a structural counterpart of hyaluronic acid with a molecular weight above 2000 kDa. This is not the same compound, however. The similarity concerns the humectant function, not chemical identity.
This is why a fruiting-body extract and mycelium on grain are two different products. The fruiting body delivers a TFPS concentration far higher than mycelium alone. Cheaper supplements are often mycelium on rice or barley, where TFPS may be below 5%. Aloha Fungi works only with the fractionally extracted fruiting body.
The best-described mechanism of Tremella. TFPS polysaccharides, thanks to the combination of mannose, xylose and glucuronic acid, form a three-dimensional water-absorbing network that binds water molecules through hydrogen bonds. In in vitro studies TFPS of lower molecular weight show deeper skin penetration than conventional high-molecular-weight hyaluronic acid (Wu 2019).
In animal models (mice with D-galactose-induced skin ageing) oral TFPS supplementation reduced the loss of hydroxyproline and hyaluronic acid in the skin and increased the activity of the antioxidant enzymes SOD, CAT and GSH-Px (Wen 2016). In UVA-stimulated skin fibroblasts TFPS increased the production of type I collagen, elastin and endogenous hyaluronic acid through activation of the Nrf2/Keap1 pathway (Hu 2021).
In the Park 2007 study a water extract of Tremella (0.01-1 μg/ml) stimulated neurite outgrowth in PC12h cells in a dose-dependent way. In an animal model (Park 2012) oral Tremella (100 or 400 mg/kg for 14 days) reversed scopolamine-induced memory impairment in rats and activated CREB transcription and raised ChAT (choline acetyltransferase) expression in the medial septal nucleus.
The mechanism differs from Lion’s Mane. Tremella does not produce NGF directly (as Lion’s Mane hericenones do), but stimulates astrocytes to synthesise NGF and supports the CREB pathway in cholinergic neurons. The Ban 2018 RCT (n=75 with subjective cognitive impairment) showed that 8 weeks of Tremella at 600 or 1200 mg/day significantly improved scores on a subjective memory-complaint questionnaire and on tests of short-term memory and executive function, and voxel-based morphometry showed grey-matter changes in the Tremella groups versus placebo.
Mechanistically Tremella β-glucans have been studied in the context of the PI3K/Akt pathway of insulin signalling: in laboratory models they regulate adipogenesis genes (PPAR-γ, leptin) and influence the gut microbiota, increasing the production of short-chain fatty acids. This describes a direction of metabolic research, not a declaration of action in disease.
The same β-glucan mechanism acts in parallel on the Dectin-1 and TLR4 receptors of dendritic cells, supporting immunomodulation (Treg regulation, reduction of IL-1β and TNF-α in inflammation models).
Tremella does not cure Alzheimer’s disease, dementia or other neurodegenerative diseases. NGF and CREB-pathway support is a physiological mechanism described in studies of the raw material, not a pharmacological intervention in an ongoing pathology. It does not replace antidiabetic medicines. A 0.07 percentage-point drop in HbA1c in an RCT is noticeable in the context of prevention but insufficient as therapy for type 2 diabetes. It does not replace hyaluronic acid cosmetics. Oral and topical action are complementary, not alternative, and Tremella and hyaluronic acid are different chemical compounds with a similar humectant function. It is not an anti-ageing miracle. The humectant mechanism is real, but there are no RCTs with measured skin parameters confirming that Tremella „erases wrinkles" in humans. It acts gently and cumulatively, over weeks and months, not instantly.
Neutral timing. Tremella neither clearly stimulates nor sedates, so it can be taken in the morning or the evening. Traditionally an evening ritual supports Lung Yin in dry seasons (autumn, winter heating).
In the cited RCTs effective doses are 600 and 1200 mg of extract a day (Ban 2018) and a daily serving of Tremella β-glucan over 12 weeks (Gitsomboon 2024). In practice 600-1200 mg of extract a day is used: 2-4 capsules, 15-25 drops once or twice a day, or 1-2 g of powder. Prevention and long-term care: 600 mg/day. Targeted protocols: 1200 mg/day. It can be split into two servings (morning and evening) or taken as one. Do not exceed the recommended daily serving.
Tremella has a polysaccharide profile, so absorption does not require the presence of fat. The best pairings are warm water, tea (green, white, oolong), cacao, plant milk, a smoothie, soup or oatmeal. Traditional culinary pairings: Tremella with jujube (Da Zao), goji (Gou Qi Zi), lily (Bai He) or lotus (Lian Zi).
The classic rhythm is 5 days on, 2 days off. This gives the immune-system receptors (Dectin-1, TLR4) time to reset their sensitivity. For Tremella the rhythm is less critical than for Reishi or Cordyceps, but it is recommended for protocol consistency. The full cumulative effect is observed after about 3 months of regular use.
2-4 weeks: first signs of hydration of the skin and mucous membranes (a less dry nose, throat, eyes), a gentler morning skin condition.
4-8 weeks: a noticeable improvement in skin tone and elasticity, a gentler mucosal reaction to dry air, a subjective improvement in the freshness of short-term memory.
8-12 weeks: a full manifestation of the Yin-tonifying effect in TCM terms, cumulative metabolic support.
The first objective effects (visible in the mirror, in photographs, in comments from those around you) usually after 6-8 weeks. It is worth noting subjective indicators: skin condition (dryness, tightness after washing the face), mucous-membrane condition (lips, nose, throat, eyes), the skin’s reaction to dry air (air conditioning, heating, flying), subjective short-term memory and tolerance of the autumn-winter season.
The best-documented synergy. Lion’s Mane (Hericium erinaceus) contains hericenones and erinacines that directly stimulate NGF production in neurons. Tremella stimulates NGF synthesis by astrocytes and activates the CREB pathway in cholinergic neurons. These are two different, complementary mechanisms of increasing NGF availability. In practice: Lion’s Mane in the morning (for focus and learning), Tremella in the evening (for consolidation and CNS nourishment). Duration: 12 weeks.
A classic TCM pairing of two Yin tonics. Reishi tonifies the Yin of the Liver and Heart (calming Shen, cortisol regulation, sleep), Tremella tonifies the Yin of the Lung and Stomach (moistening, generation of Jin Ye). Together they cover the full Yin profile: emotional (Shen) and physical (body fluids). A classic protocol for the chronically overworked, after a long period of stress, during menopause or with signs of internal dryness. Tremella in the evening, Reishi in the evening. Duration: 8-12 weeks.
Cordyceps is a classic tonic of Kidney Yang and Jing, Tremella a tonic of the Yin of the Lung, Stomach and Kidney. In TCM a Yin/Yang pairing from the same meridian (Kidney) is one of the strongest models of homeostasis. Cordyceps gives power and drive, Tremella moistens and protects against overheating. Indications: athletes in a phase of intensive training (Cordyceps before training, Tremella in the evening for recovery), people with energetic burnout combined with signs of dryness. Duration: 8-12 weeks.
Chaga (Inonotus obliquus) is an anti-inflammatory and strongly antioxidant mushroom (SOD, melanins, phenolic acids). Tremella adds a hydration layer and support for the mucous membranes. A protocol classically recommended for the autumn-winter season: Chaga in the morning (immunity, antioxidation), Tremella in the evening (hydration after a day in dry air, support for Lung Yin). Duration: 8-12 weeks.
Coriolus (Trametes versicolor) is the most strongly immunostimulating through its PSK/PSP fraction. After an infection, antibiotic therapy or during convalescence Tremella rebuilds Lung Yin and Jin Ye (dried out by fever and dry cough), while Coriolus restores immune balance. This protocol is classically recommended for post-COVID syndrome with dominant dryness and fatigue and after long antibiotic courses. Duration: 8-12 weeks.
Tremella (yin er) in the classical Chinese Materia Medica is an imperial mushroom and one of the most important Yin tonics. It tonifies the Yin of the Lung and Stomach, generates fluids (Jin Ye), moistens dryness and supports Jing. Traditionally indicated for dry cough, dry skin and mucous membranes and exhaustion after a long illness.
This is a frame of cultural observation, not a medical diagnosis. Concepts such as Yin, Jin Ye or meridian do not correspond one to one with Western anatomy or physiology.
| Taste | sweet, bland (淡 dàn) |
| Nature | neutral (some sources: slightly cooling) |
| Meridians | Lung, Stomach, Kidney |
| Category | Yin tonic (滋阴药 zī yīn yào) |
Known allergy to mushrooms of the Tremellaceae family or cross-hypersensitivity to other medicinal mushrooms (symptoms: itching, swelling, skin redness, cough, shortness of breath).
Status after organ transplant with active immunosuppression (cyclosporine, tacrolimus, mycophenolate, everolimus). β-glucans activate Dectin-1 and TLR4, which could theoretically weaken the effect of the immunosuppressant.
Children under 18 (no safety studies in this age group).
Anticoagulant and antiplatelet medicines (warfarin, acenocoumarol, NOACs, clopidogrel, acetylsalicylic acid at cardiological doses). Tremella polysaccharides may prolong the partial thromboplastin time. The effect is mild, but alongside anticoagulant treatment it requires INR monitoring.
Antidiabetic medicines (insulin, metformin, sulfonylureas, incretins). Given the influence of β-glucans on metabolism described in the research, caution, glycaemic monitoring and a consultation with a diabetologist are advised alongside such treatment.
Pregnancy and breastfeeding. In TCM Tremella is traditionally considered safe in pregnancy, but there are no RCTs in this population. Caution is advised and use only after consultation.
Planned surgery: given a possible mild anticoagulant effect, stop Tremella at least 14 days before the procedure.
Reported rarely: gastrointestinal complaints (bloating, loose stools, a feeling of fullness) linked to the mucilaginous nature of the polysaccharides, more common in people with weak digestion (solution: halve the serving, take with a warm meal); allergic reactions in people hypersensitive to mushrooms; a mild feeling of coldness in the stomach on an empty stomach in people with a constitutionally cold digestion (solution: take with a warm drink or after a meal).
In the cited RCTs effective doses are 600 and 1200 mg of extract a day (Ban 2018) and a daily β-glucan serving over 12 weeks (Gitsomboon 2024); neither study reported side effects. In long-term practice most often 600-1200 mg/day.
Evidence verdict
We also show what is not proven. This is a dietary supplement, not a medicine.
3
Strong evidence
confirmed composition
4
Preliminary
in vitro and animal studies
3
Not proven
no human studies
Reviewed by
Mateusz Rosa · Doctor of Acupuncture (WFAS)
Version 1.0 · Updated: 21 June 2026 · Subject-matter reviewer: Mateusz Rosa, founder of Aloha Fungi, TCM therapist, Doctor of Acupuncture (WFAS), author of books on functional mushroom supplementation.
Based on 11 verified sources
See sources ↓| Claim | Type of evidence | Strength |
|---|---|---|
| Reduction in HbA1c and waist circumference in prediabetic subjects | RCT n=56, 12 wks, double-blind, p<0.05 (Gitsomboon 2024) | MOCNY |
| Improvement in subjective memory and executive function in SCI | RCT n=75, 8 wks, double-blind, two doses (Ban 2018) | MOCNY |
| TFPS polysaccharides bind water and act as a humectant (mechanism) | repeatedly confirmed in vitro, review monographs (Wu 2019, Mendes 2025) | MOCNY |
| Tremella stimulates NGF synthesis by astrocytes and activates CREB | in vitro PC12h and animal model (Park 2007, Park 2012), no human RCT measuring NGF | WSTĘPNY |
| Support for synthesis of collagen I, elastin and endogenous HA in skin | UVA-stimulated fibroblasts (Hu 2021), animal D-galactose ageing models (Wen 2016) | WSTĘPNY |
| Tremella supports Lung Yin and mucous-membrane moistening in dry cough | TCM tradition, small clinical studies, no large RCTs | WSTĘPNY |
| Anti-stress action through HPA-axis modulation (uridine, mannose) | animal model (Lee 2025), no human RCT | WSTĘPNY |
| „Tremella erases wrinkles" or rejuvenates skin in humans | no RCT with measured skin parameters | BRAK |
| „Cures" Alzheimer’s, dementia or MCI | none, claim unsupported and prohibited by regulation | BRAK |
| „Tremella replaces hyaluronic acid in cosmetics" | similar humectant mechanism, but different chemical compounds | BRAK |
MOCNY = solid evidence · WSTĘPNY = moderate or preliminary · BRAK = unsupported or prohibited by regulation.
The educational content on this page does not replace medical advice. A dietary supplement is not a medicine and should not replace a varied diet or medical consultation. Before starting supplementation, especially with chronic conditions, pregnancy, breastfeeding or when taking medication, consult a doctor. Aloha Fungi does not claim therapeutic efficacy for any product; the mechanisms described are based on the current state of the literature. All products are dietary supplements notified to the Polish Chief Sanitary Inspectorate (GIS).