Wood Ear Fungus

What is wood ear fungus?

Wood ear is a rubbery, ear-shaped fungus that grows on dead wood. Known as black fungus, tree ear or mu er, it is a staple of Chinese dishes such as hot and sour soup, valued more for its crunchy texture than its flavor. Taxonomists have debated the proper name, with Auricularia auricula and Auricularia auricula-judae both in use. Dried wood ear is rich in soluble fiber in the form of polysaccharides, and also contains melanin pigments and minerals.

What the research says

Lab and animal findings

A 2021 review in the Journal of Agricultural and Food Chemistry summarizes wood ear’s composition and biological activities, based mostly on laboratory and animal studies. The authors note a lack of research on its functional nutrition and say most work has focused narrowly on polysaccharides (Liu et al., 2021). These findings are a starting point, not evidence of benefit in people.

Human evidence

We did not find randomized human trials showing that wood ear supplements lower cholesterol, improve blood flow or reduce cardiovascular risk. Claims that it supports “healthy blood levels” are not supported by clinical data. Its soluble fiber content is a plausible reason it might be part of a heart-healthy diet, but whole-food fiber from cooked wood ear is very different from a few dozen milligrams of extract in a capsule.

Safety and interactions

Wood ear has a long history as a cooked food and appears safe in normal culinary amounts. Concentrated extracts have not been studied for drug interactions. As a precaution, people taking anticoagulant or antiplatelet medicines should talk to their doctor before using concentrated mushroom products, and anyone with an upcoming surgery should mention all supplements to the surgical team. Dried wood ear should be rehydrated and cooked properly before eating.

How it’s used in supplements

Wood ear is primarily a food. It sometimes appears in multi-mushroom blends and fiber products, usually in undisclosed amounts. Eating it cooked in soups and stir-fries is a reasonable way to add fiber to the diet. If you are considering a supplement mainly for cholesterol, ingredients such as psyllium or oat beta-glucan have far more human evidence, and they are best discussed with your doctor alongside diet and activity changes. Wood ear in a proprietary blend should be seen as a minor, untested addition rather than a reason to buy a product. Concentrated extracts have not been studied in pregnancy or breastfeeding.