Tremella(Tremella fuciformis)

What tremella is and where it comes from

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 together with its host fungus. Parameters for a specific raw material, including polysaccharide content and contaminant test results, should come from the documentation for that batch.

Tradition of use

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 placed Tremella within traditional descriptions of Lung and Stomach Yin and Jin Ye. We include this classification as historical context, not as an indication for a modern supplement.

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.

Bioactive composition, what is in the extract

The main complex described in the literature is the TFPS polysaccharides. Structurally they include glucuronoxylomannan, a linear (1→3)-α-D-mannose chain with side branches of β-D-xylose, α-D-fucose and β-D-glucuronic acid. Published parameters of research material are not automatically parameters of a product.

β-1,3/1,6-glucans occur within the TFPS fraction and as a separate component. Their relationships with Dectin-1 and TLR4 receptors are subjects of laboratory research.

Composition analyses have also described uridine, mannitol, ergosterol, provitamin D₂, amino acids and trace elements. The presence and quantity of individual compounds depend on the raw material and analytical method.

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.

A fruiting-body extract and mycelium grown on grain are different raw materials. When comparing products, check the part of the mushroom, carriers, extraction method, declared standardisation and documentation for the specific batch.

How does TCM describe Tremella?

In classical Chinese Materia Medica, Tremella, yin er, is classified as a Yin tonic and associated with descriptions of the Lung, Stomach and Jin Ye. These are historical categories within a traditional system.

This is a cultural framework, not a medical diagnosis or evidence that the product is effective. Concepts such as Yin, Jin Ye or meridian do not correspond one to one with Western anatomy or physiology.

Strength of evidence: an honest qualification of claims

STRONG = solid evidence · PRELIMINARY = moderate or preliminary · NONE = unsupported or prohibited by regulation.