Updated
What people reported after taking them
The US Food and Drug Administration keeps a voluntary register of what people report after taking a food or a supplement, and some of these mushrooms turn up in it. Read it carefully. A report is somebody saying something happened after they took something, which is not a finding that it caused it. Nobody is required to report, so every count below is a floor and the real rate is unknown. And a mushroom with no reports has not been shown to be safe — it has been shown to be unreported.
| Species | Reports | Most often reported | Most serious outcome recorded |
|---|---|---|---|
| Oyster mushroom | 69 | Diarrhoea (25), Vomiting (20), Gastroenteritis Vibrio (19), Nausea (14) | Death (5) |
| Cauliflower fungus | 49 | Diarrhoea (19), Vomiting (14), Abdominal Pain (12), Nausea (12) | Life Threatening (1) |
| Lion's mane | 46 | Headache (9), Anxiety (7), Vomiting (7), Diarrhoea (6) | Death (1) |
| Cordyceps | 38 | Loss Of Consciousness (4), Vomiting (4), Headache (3), Hepatic Enzyme Increased (3) | Life Threatening (5) |
| Reishi | 22 | Malaise (3), Abdominal Pain Upper (2), Dizziness (2), Dyspnoea (2) | Life Threatening (3) |
| Shiitake | 15 | Vomiting (7), Diarrhoea (6), Nausea (6), Abdominal Pain (3) | Life Threatening (1) |
| Chaga | 8 | Abdominal Pain (1), Convulsion (1), Chest Pain (1), Chills (1) | Disability (1) |
| Maitake | 7 | Abdominal Pain (1), Abdominal Pain Upper (1), Aphagia (1), Back Pain (1) | Life Threatening (1) |
| Turkey tail | 6 | Anxiety (1), Atrial Fibrillation (1), Blood Pressure Increased (1), Delusion (1) | Life Threatening (1) |
| Morel | 5 | Death (3), Diarrhoea (3), Nausea (3), Vomiting (3) | Death (3) |
| Enoki | 2 | Diarrhoea (2), Abdominal Pain (1), Emergency Care (1), Gastrointestinal Disorder (1) | Visited Emergency Room (2) |
| Tremella | 0 | — | — |
| Royal sun agaric | 0 | — | — |
| King oyster | 0 | — | — |
| Poria | 0 | — | — |
| Zhu ling | 0 | — | — |
| Antrodia | 0 | — | — |
| Mesima | 0 | — | — |
| Wood ear | 0 | — | — |
| Shimeji | 0 | — | — |
| Birch polypore | 0 | — | — |
| Agarikon | 0 | — | — |
| Artist's conk | 0 | — | — |
| Chicken of the woods | 0 | — | — |
| Button mushroom | 0 | — | — |
Source: openFDA, the FDA's own interface to the Center for Food Safety and Applied Nutrition Adverse Event Reporting System, matched on the product brand-name field. A product sold under a blend name will not appear under its mushroom, so blends are under-counted here by construction.