Don't pick, buy or eat wild mushrooms; no “folk method” of telling safe ones apart works

Cost

Free. The hard part is giving up a seasonal wild food.

What you get

The Chinese Center for Disease Control and Prevention (中国疾控中心) investigated 828 mushroom poisoning incidents in 2025, involving 2165 people, with 13 deaths. The case fatality rate was 0.6%, meaning 0.6% of poisoned people died. From 2019 to 2024 there were 276 to 676 incidents a year, with case fatality rates between 0.87% and 2.86%. In 2025 alone, 138 species of poisonous mushrooms were identified, of which 34 were recorded in China for the first time as causing poisoning. The Chinese CDC's public-education material rebuts the folk methods one by one. “Only brightly colored ones are poisonous”: wrong, whether a mushroom is poisonous has nothing to do with its color. “If bugs have eaten it or it has maggots, it's not poisonous”: wrong, many deadly mushrooms are also eaten by bugs once mature. “One that changes color when cooked with silver or garlic is poisonous”: wrong, mushroom toxins contain no sulfur, and a silver needle turns black because of sulfur. “High-heat frying removes the poison”: also unreliable. Its conclusion is that “there is currently no simple, quick and effective way to tell whether a mushroom is poisonous.” The Beijing Municipal Administration for Market Regulation's 2026 notice says that anyone who feels unwell after eating one by mistake should “seek medical care immediately and not handle it themselves,” and keep the leftover mushrooms and food residue so doctors can identify the toxin

Notes

If you suspect you ate the wrong one, go to the hospital right away; don't handle it yourself at home. Bring the leftover mushrooms, food residue or photos you took. Mushroom poisoning comes in several types, and identifying which mushroom it was directly decides how the doctor treats it. New species are recorded as poisonous every year, so the premise that “locals know them well” does not hold. Testing with a silver needle, cooking with garlic, “if bugs eat it, it's safe,” and “only brightly colored ones are poisonous” are all wrong. Wood ear and white fungus soaked for too long, and wet rice noodles left out for too long, carry a different poison; see §1.48 (soaked wood ear).

Evidence grade

A : Specific numbers from meta-analyses, large cohorts or randomized trials; for law and policy, the statute or official text.

Sources

1. Mushroom Poisoning Outbreaks — China, 2025. China CDC Weekly (2026): "In 2025, China CDC investigated 828 mushroom poisoning incidents across 27 provincial-level administrative divisions (PLADs), affecting 2,165 individuals and causing 13 deaths - a case fatality rate of 0.6%, the lowest of the past six years. In total, 138 poisonous mushroom species were identified, including 34 newly recorded in poisoning incidents in China." "From 2019 to 2024, the annual number of incidents ranged from 276 to 676, and the case fatality rate ranged from 0.87% to 2.86%." https://doi.org/10.46234/ccdcw2026.120
2. The same journal's 2024 annual report. https://doi.org/10.46234/ccdcw2025.106
3. Yin Yu and Li Haijiao, Institute for Occupational Health, Chinese Center for Disease Control and Prevention (2019). Preventing and Controlling Mushroom Poisoning Has a Long Way to Go [in Chinese]: "Method 4: Mushrooms eaten by insects or with maggots are not poisonous. Wrong!" "Method 6: Mushrooms that change the color of silver, scallions, garlic or rice when cooked together are poisonous. Wrong!" "Therefore, there is currently no simple, quick and effective way to tell whether a mushroom is poisonous". https://www.chinacdc.cn/jkkp/zyjk/zdzs/201908/t20190802_301109.html
4. Beijing Center for Disease Control and Prevention (2023). Stay Away from Poisonous Mushrooms and Don't Be a "Mushroom Hero" [in Chinese]: "The folk methods for identifying poisonous mushrooms, such as looking at color and shape, looking at the growing environment, testing with silverware, looking at secretions, and checking for maggots or insects, are all unreliable". https://www.bjcdc.org/cdcmodule/jkfw/yyyspjk/jkyf/swzdyf/2023/35518.shtml
5. Beijing Municipal Administration for Market Regulation (2026). Risk Alert on Preventing Poisoning from Accidentally Eating Wild Mushrooms [in Chinese]: "Seek medical care immediately. Do not treat it yourself, so as not to delay diagnosis and treatment. Properly keep samples such as leftover wild mushrooms and food residue". https://scjgj.beijing.gov.cn/zwxx/scjgdt/202606/t20260625_4715961.html

Translated from the Chinese original. Original book, section 1, tip 5. This section is about health and medicines. It is general information, not a substitute for a doctor’s diagnosis or prescription. Content may be out of date and rules differ by place. When you actually deal with an agency, a doctor or a court, follow what local officials, doctors and lawyers tell you. Disclaimer