The Weed that Beats Superbugs

Looking out my office window, I see a beautiful natural setting and a small lawn covered in bright yellow flowers and I wonder:  “Why do so many people despise dandelions?”  While they think up new and toxic ways to eradicate these “weeds,” I celebrate their powerful medicinal qualities based on their high levels of vitamins, minerals, and other medicinal compounds.  Recently researchers have added superbug killer to the dandelion’s impressive health-boosting resume.  Scientists from the Huaihai Institute of Technology in Lianyungang, China found that the yield of polysaccharides from dandelion showed high antibacterial activity against Escherichia coli (E. coli), Bacillus subtilis, and Staphylococcus aureus.

People can contract E. coli when they come into contact with the feces of both people or animals. While this sounds unlikely, the frequency with which food or water is contaminated by the bacteria may alarm you. Meat is the most common culprit in the United States. E. coli can get into meat during processing and remain active if the meat is not cooked to an internal temperature of 160° F.

Other food that has come in contact with infected meat can also pick up the bacteria. Raw milk and dairy products can also pick up E. coli from cows’ udders and even fruits and vegetables that come in contact with infected animal feces can be contaminated with E. coli.  The bacteria can also be found in pools, lakes and water supplies and on people who do not properly wash their hands after having bowel movements.

E. coli has always been with us but experts now estimate that 30 percent of all E. coli urinary tract infections are resistant to treatment. As I researched my upcoming book, The Probiotic Miracle, I found that only five percent were resistant a mere decade ago. Scientists have discovered that E. coli has developed the ability to secrete a substance called beta-lactamase which deactivates antibiotics. The mechanism known as “extended-spectrum beta lactamase” is also showing up in other bacteria, further disabling the effectiveness of antibiotic drugs.

Bacillus subtilis is ever-present in the air, water and soil.  The bacteria rarely colonize the human body but can cause allergic reactions when people are exposed to it in high amounts. It produces a toxin called subtilisin which, oddly enough, is used in some laundry detergents.  Its composition is very similar to E. coli so it is often used in laboratory research.

Staphylococcus aureus is not so benign.  When you read news stories about the prevalence of antibiotic-resistant superbugs in hospitals, chances are you are reading about MSRA, or methicillin-resistant Staphylococcus aureus. According to the Public Health Agency of Canada, the bacteria are a leading cause of food poisoning. Infection can also be obtained through animal bites, and contact with another person, particularly if he or she has infected lesions. MSRA rates are increasing in crowded environments like hospitals and nursing homes, and symptoms can vary from a brief period of nausea and vomiting to toxic shock or death.

The Chinese researchers concluded that the dandelion, that despised weed, contains compounds that may be a viable option for use as a food preservative, thereby reducing the risk of these deadly bacteria. Further study is needed to explore a wider variety of bacteria-fighting applications for this powerful little flower.

Try eating dandelions in one of these recipes:
Cream of Dandelion Soup
Dandelion Syrup

Learn more about how dandelion can help your health in Weekend Wonder Detox:  Quick Cleanses to Strengthen Your Body and Enhance Your Beauty by Michelle Schoffro Cook, PhD, ROHP.

Check out my new books Weekend Wonder Detox and 60 Seconds to Slim. Subscribe to my free e-magazine Worlds Healthiest News to receive monthly health news, tips, recipes and more. Follow my blog on my sites and, and Twitter @mschoffrocook and Facebook.


Angela Malafouris

Weeds never cease to amaze me, doctors are more amazed than me I think. With each weed you can have new natural ways to fight a disease. yeah for green being good and feisty!

Janice Thompson
Janice Thompson4 years ago

I have always loved dandelions. Every summer when that little hand brings a blossom to me, I thrill at the sight. I keep forgetting to take a picture...

Debbie Crowe
Debbie Crowe4 years ago

These researchers can come to my lawn in the spring and have as many dandelions as they want.

Sarah Hill
Sarah Hill5 years ago


Sara Sezun
Sara S5 years ago

It's ironic that this beautiful little flower, so long despised by people who want "perfect" lawns, has so much to offer humanity.

Tanya W.
Tanya W5 years ago

Not sure if we have Dandelions in Australia?!

Tanya W.
Tanya W5 years ago

Noted thanks.

Robyn Rae
YOLANDA H5 years ago

cool good info

Michelle Schoffro Cook

Actually Elizabeth B. almost all weeds are useful and have therapeutic properties.

Sandra Penna
Sandra Penna5 years ago

interesting, thank you.