Black Fungus Overnight Soaking Poses Deadly Poisoning Risk, Experts Warn
SingTao · 1 SOURCESabout 1 hour ago5 MIN
Summary
Black fungus, a staple ingredient in Hong Kong kitchens used for cold dishes, stir-fries, and soups, carries a hidden lethal danger when prepared using the common practice of overnight soaking at room temperature. Food safety specialists have issued urgent warnings that extended room-temperature soaking creates ideal conditions for dangerous bacterial growth and toxin production that cannot be eliminated by washing or cooking.
Key Points
- Dried black fungus becomes extremely dangerous when soaked at room temperature for more than 4 hours, allowing Burkholderia gladioli bacteria to multiply and produce Bongkrekic acid
- Bongkrekic acid is colorless, odorless, and tasteless, making it impossible to detect even when the fungus appears normal and has no sour smell
- Bongkrekic acid is heat-resistant and cannot be destroyed by washing multiple times or boiling; no specific antidote exists in modern medicine
- Bongkrekic acid attacks cellular mitochondria, blocking energy production and causing cell death, with symptoms including severe abdominal pain, nausea, vomiting, and diarrhea appearing within 1-10 hours
- Dr. Qiu Xiaocheng (邱筱宸), attending physician at West Garden Hospital's Obstetrics and Gynecology Department, documented fatal cases of multiple organ failure from overnight-soaked fungus
Why It Matters
This warning carries particular significance for Hong Kong households where overnight soaking of dried ingredients is a common culinary practice. The combination of warm climate and traditional cooking habits creates ideal conditions for this little-known but deadly food poisoning risk. With no available antidote and extremely high fatality rates, public awareness of proper food storage and preparation methods could be the difference between life and death for countless families who regularly consume black fungus and related products like wet rice noodles and fermented starch foods .
This warning carries particular significance for Hong Kong households where overnight soaking of dried ingredients is a common culinary practice. The combination of warm climate and traditional cooking habits creates ideal conditions for this little-known but deadly food poisoning risk. With no available antidote and extremely high fatality rates, public awareness of proper food storage and preparation methods could be the difference between life and death for countless families who regularly consume black fungus and related products like wet rice noodles and fermented starch foods .