Enoki mushroom (Flammulina velutipes, sometimes labeled Flammulina filiformis) is a long, thin, white mushroom sold in clusters and used widely in Asian cooking. It is low in calories, provides fiber and potassium, and contains compounds under early laboratory and animal research for immune and metabolic effects. It also has a documented history of Listeria contamination in imported raw product, so safe handling matters more with enoki than with most other mushrooms.
Important Safety Warning: Listeria Risk in Raw Enoki Mushrooms
Before anything else, know this: imported raw enoki mushrooms have caused multiple U.S. Listeria outbreaks. The Food and Drug Administration (FDA) and Centers for Disease Control and Prevention (CDC) investigated a multistate outbreak in 2020 tied to enoki mushrooms from a Korean producer, and a second outbreak in 2022–2023 tied to enoki mushrooms imported from China. In the 2022 outbreak, five people across four states were sickened and all five were hospitalized, including one pregnancy-associated illness.
Because of this pattern, CDC and FDA give specific, ongoing advice for enoki mushrooms:
- People who are pregnant, aged 65 or older, or who have a weakened immune system should not eat raw enoki mushrooms.
- Cook enoki mushrooms thoroughly rather than eating them raw in salads or as a garnish.
- Keep raw enoki mushrooms separate from foods that will not be cooked, to avoid cross-contamination.
- Wash hands, utensils, and surfaces after handling raw enoki mushrooms.
Listeria can grow even under refrigeration, and contaminated mushrooms often look, smell, and taste normal. If you have purchased enoki mushrooms, check FDA’s recall listings for your specific brand and lot before use.
Enoki Mushroom Nutrition Facts
According to USDA nutrient data, raw enoki mushrooms are mostly water and carry a light nutrient profile typical of most fresh mushrooms. Approximate values per 100 grams (about 3.5 ounces) of raw enoki mushroom:
- Calories: about 40–45 kcal
- Protein: about 2.5–2.7 grams
- Total fat: under 0.5 grams
- Carbohydrates: about 7 grams
- Dietary fiber: about 2.5 grams
- Potassium: roughly 350–370 milligrams
- Iron: about 1 milligram
- Sodium: very low, typically under 5 milligrams
This places enoki mushrooms among the lower-calorie, higher-fiber options in the produce aisle, with a potassium contribution similar to other fresh mushroom varieties. Exact values vary somewhat by growing conditions and whether the mushrooms are measured raw or cooked.
What Preliminary Research Shows — and What It Does Not
Enoki mushroom has been studied for several bioactive compounds, but it is important to separate what has been tested in humans from what has only been tested in animals or in laboratory cell cultures.
No confirmed human clinical trials. A search of available research did not identify a completed human clinical trial testing whole enoki mushroom, enoki extract, or the enoki protein FVE for a specific health outcome. Most existing evidence comes from cell-culture (in-vitro) and animal studies.
Animal and cell research includes:
- A 2010 study in mice found that oral administration of FVE, an immune-modulating protein isolated from enoki mushroom, activated innate and adaptive immune responses and slowed tumor growth in a liver cancer model. This is an animal finding and has not been confirmed in people.
- A 2014 hamster study found that enoki mushroom powder and extract, rich in dietary fiber and polysaccharides, was associated with changes in lipid metabolism, consistent with a cholesterol-lowering effect seen in other high-fiber mushroom research. This has not been tested in a human clinical trial specific to enoki.
- Laboratory (in-vitro) research has examined enoki mushroom extracts for antioxidant activity, antibacterial activity against several bacterial strains, and neuroprotective effects on cultured neurons. These are early-stage findings from petri-dish and cell-line experiments, not evidence of effects inside a living person.
Taken together, this is an actively studied mushroom with several plausible mechanisms under investigation, but the human evidence needed to support any specific health claim does not yet exist. Preclinical findings often do not replicate in human trials, so these results should be read as hypothesis-generating rather than proof of benefit.
Should You Eat Enoki Mushrooms? A Simple Decision Path
- Are you pregnant, 65 or older, or living with a weakened immune system? If yes, avoid raw enoki mushrooms entirely and only eat them thoroughly cooked.
- Has the specific brand and lot you have been subject to an active FDA recall? If yes, do not eat it, and follow FDA disposal and surface-cleaning guidance.
- Are you cooking the mushrooms fully, heated throughout, not just briefly rinsed or added raw to a finished dish? If not, cook them before eating, even if you are not in a higher-risk group.
- If none of the above apply, enoki mushrooms cooked according to safe food-handling steps can fit into a typical diet as a low-calorie, fiber-containing food, the same way any other cooked mushroom would.
Evidence Limits
This article relies on USDA nutrient data and FDA and CDC outbreak investigation records for the safety information, and on published animal and cell-culture studies for the research section. No human clinical trials specific to enoki mushroom were identified. Nutrient values can vary by mushroom source and preparation. Outbreak and recall information changes over time, so always check FDA’s current recall page for the most recent status before consuming a specific product.
Who Needs Extra Caution
- Pregnant women, due to the risk of miscarriage or stillbirth from Listeria infection.
- Adults aged 65 and older, who face higher risk of severe listeriosis.
- Anyone with a weakened immune system, including from certain medications or medical conditions.
- Anyone unsure whether their enoki mushrooms are part of a current recall.
These groups should not eat raw enoki mushrooms and should confirm mushrooms are thoroughly cooked before eating them.
Frequently Asked Questions
Is it safe to eat raw enoki mushrooms?
For most healthy adults, thoroughly cooked enoki mushrooms carry a much lower Listeria risk than raw ones. CDC and FDA specifically advise pregnant people, adults 65 and older, and people with weakened immune systems not to eat raw enoki mushrooms at all.
What should I do if I have enoki mushrooms at home during a recall?
Check the brand, package label, and lot information against FDA’s current recall listing. If your product matches a recall, do not eat it. Throw it away in a way that other people or animals cannot access it, and clean any surfaces, containers, or utensils that touched the mushrooms, since Listeria can survive refrigeration and spread to other food.
Do enoki mushrooms have proven health benefits?
Enoki mushrooms have been studied in animal and laboratory research for immune, cholesterol-related, and antioxidant effects, but no completed human clinical trials specific to enoki mushroom were identified. This means potential benefits are not yet established in people.
Are all mushroom types affected by the same Listeria risk as enoki?
No. FDA outbreak investigations specifically identify imported raw enoki mushrooms as the source, and FDA has developed a prevention strategy focused on imported enoki and wood ear mushrooms. This does not mean every mushroom type carries the same documented risk, but general food safety practices, such as thorough cooking and proper storage, are reasonable for any mushroom.
Educational Disclaimer
This article is for general educational purposes only and is not medical advice. It does not diagnose any condition, recommend a supplement, or tell you to start, stop, or change any medication. Food safety guidance can change as investigations continue. If you have questions about a recall, a food safety exposure, or symptoms after eating mushrooms, contact a healthcare provider or your local health department. Learn more about how this site grades evidence at our Evidence Grading and Source Policy page, and review our full safety scope at our Medical Disclaimer. For details on how our content is researched and fact-checked, see our Editorial Standards page.