Asparagus of the Woods: Edible?
Caution Urged When Consuming Wood Asparagus Due to Toxicity Concerns
Table of Contents
- Caution Urged When Consuming Wood Asparagus Due to Toxicity Concerns
- Wood Asparagus: Understanding the Risks and Staying Safe
- What is Wood Asparagus?
- Why Should I be Cautious About Consuming Wood Asparagus?
- What Are the Common Symptoms of Wood Asparagus Poisoning?
- How Common is Wood asparagus Poisoning?
- What is ANSES?
- What did the ANSES Examination Reveal?
- What Did the ANSES Study on Wood Asparagus find?
- Who Is Most Affected by Wood Asparagus Poisoning?
- What Are the Toxic Components of wood Asparagus?
- What Causes the Toxicity of Wood Asparagus?
- How Does Mucilage contribute to the Symptoms?
Health officials are advising caution when consuming wood asparagus (Ornithogalum pyrenaicum), a plant found throughout the Mediterranean region and belonging to the asparagaceous family. While increasingly popular as an edible wild plant, it’s known toxicity has prompted a warning from the French food safety agency, ANSES.
ANSES recently released a report detailing findings from recent years and a specific study conducted after multiple reports of poisoning linked to the plant.
Recent Poisoning Cases
Data from the Nancy Poison Control Center indicates that between 2010 and 2020, 48 of 66 people (73%) who consumed wood asparagus in 37 separate incidents experienced serious symptoms.
The most common symptoms reported were intense pain in the mouth and throat (42% of cases), a sensation of swelling in the mouth or throat (29%), and difficulty swallowing (29%). Some individuals also experienced skin rashes. Symptoms typically appeared within three hours of ingestion, ruling out an acute allergic reaction.
ANSES Inquiry
The ANSES investigation sought to determine if the reported poisonings were definitively linked to wood asparagus or misidentification of other wild plants. Researchers also explored whether the plant’s origin, cooking methods, and quantity consumed played a role, and whether the plant contains toxic substances.
To address these questions, ANSES researchers analyzed cases reported to poison control centers in 2022 and 2023. They examined samples collected from the wild, and also those sold in markets and supermarkets. During this period, eight incidents involving 20 people were investigated, with 12 individuals experiencing symptoms (four cases were classified as not serious). Botanical analysis confirmed that the plant consumed was indeed Ornithogalum pyrenaicum in all cases. The asparagus was typically consumed shortly after harvesting, prepared by boiling, steaming, or pan-frying, and eaten in quantities ranging from a few spears to approximately 30.
The affected individuals were men and women aged 36 to 72, with no prior history of food allergies. Symptoms consistently appeared several hours after consumption.
Toxic Components Identified
The consistent identification of Ornithogalum pyrenaicum in poisoning cases prompted researchers to focus on the plant’s composition to identify potential toxins. Previous scientific literature lacked in-depth research on this topic.
Researchers pulverized samples and dissolved the resulting powder in water. Microscopic examination of the viscous solution revealed abundant mucilage and calcium oxalate crystals in the form of needles (raphides). Similar needles are found in other plants, such as Araceae, known to cause irritation upon contact, providing a clue to the potential cause of the symptoms.
Chromatographic analysis confirmed the presence of mucilage (complex sugars that absorb water) and raphides, and also sugars, fatty acids, and sitosterol, a non-toxic fat commonly found in plants.
Proposed Mechanism of Toxicity
The prevailing hypothesis suggests that calcium oxalate crystals are responsible for the observed oropharyngeal symptoms. These microscopic needles, resistant to cooking, likely cause mechanical irritation of the mucous membranes. The resulting damage to the mucous membranes may also increase susceptibility to other potentially harmful substances.
Mucilage may also contribute to the delayed onset of symptoms by initially trapping the raphides and then releasing them over time. Individual susceptibility may also play a role, as some individuals have consumed wood asparagus in the past without experiencing any adverse effects.
Though, these remain hypotheses requiring further investigation, including comparisons with plants known to cause similar effects due to high raphide content.
ANSES does not reccommend prohibiting the consumption of wood asparagus. However, given its increasing popularity, the agency emphasizes the importance of informing the public and healthcare professionals about the potential risks and improving the monitoring and reporting of poisoning cases.
In cases of suspected poisoning, individuals are advised to seek medical attention or contact a poison control center, providing a photograph of the consumed plant to aid in diagnosis and treatment.
Wood Asparagus: Understanding the Risks and Staying Safe
Are you curious about wood asparagus and its potential risks? Here’s what you need to know, broken down into easy-to-understand answers.
What is Wood Asparagus?
Wood asparagus, scientifically known as Ornithogalum pyrenaicum, is a plant belonging to the asparagaceous family. It’s found throughout the Mediterranean region and is becoming increasingly popular as an edible wild plant.
Why Should I be Cautious About Consuming Wood Asparagus?
health officials are advising caution due to known toxicity concerns. The French food safety agency, ANSES, has issued a warning following reports of poisonings linked to its consumption.
What Are the Common Symptoms of Wood Asparagus Poisoning?
Based on data from the Nancy Poison Control Center, the most common symptoms reported include:
Intense pain in the mouth and throat (42% of cases)
A sensation of swelling in the mouth or throat (29% of cases)
Difficulty swallowing (29% of cases)
Some individuals also experienced skin rashes.
Symptoms typically appear within three hours of consumption, ruling out an acute allergic reaction.
How Common is Wood asparagus Poisoning?
Between 2010 and 2020, 48 out of 66 people (73%) who consumed wood asparagus in 37 separate incidents experienced serious symptoms, according to the Nancy poison Control Center.
What is ANSES?
ANSES is the French food safety agency. They conducted a study into the reported cases of wood asparagus poisoning.
What did the ANSES Examination Reveal?
The ANSES investigation aimed to determine if the poisonings were definitively linked to wood asparagus or if misidentification of other wild plants was involved. Researchers also explored the influence of the plant’s origin, cooking methods, and quantity consumed. The agency’s findings concluded that Ornithogalum pyrenaicum was indeed the cause in the recent cases.
What Did the ANSES Study on Wood Asparagus find?
ANSES researchers analyzed cases reported to poison control centers in 2022 and 2023. Botanical analysis confirmed the plant consumed was Ornithogalum pyrenaicum in all cases. Eight incidents involving 20 people were investigated, with 12 individuals experiencing symptoms. The asparagus was typically consumed shortly after harvesting, prepared by boiling, steaming, or pan-frying, and eaten in quantities ranging from a few spears to approximately 30.
Who Is Most Affected by Wood Asparagus Poisoning?
Individuals aged 36 to 72, both men and women, experienced symptoms. There was no prior history of food allergies in the affected individuals.
What Are the Toxic Components of wood Asparagus?
Researchers identified the following components in wood asparagus samples:
Mucilage: Complex sugars that absorb water.
Raphides: Calcium oxalate crystals in the form of needles.
* Sugars, fatty acids, and sitosterol: Sitosterol is a non-toxic fat commonly found in plants.
What Causes the Toxicity of Wood Asparagus?
The prevailing hypothesis suggests that calcium oxalate crystals (raphides) are responsible for the symptoms. these microscopic needles cause mechanical irritation of the mucous membranes.
How Does Mucilage contribute to the Symptoms?
mucilage may contribute to the delayed onset of symptoms by initially trapping the raphides then releasing them