Common Fungus Beats the Flu at Its Own Game
By
Dr. Scott Olson, ND
Posted March 23, 2025
Big Pharma pushes annual flu shots like your life depends on it. What’s more, they insist expensive antivirals are your only defense against influenza.
But Mother Nature is hiding a more effective solution right under our noses—or rather, under forest floors and in grocery store produce sections.
There’s growing evidence that the humble mushroom is packed with flu-fighting potential.
These fantastic fungi are turning out to be medicinal superstars. Research shows they can reduce depression risk, improve brain cell growth, and guard against cancer.
Now, a new mouse study reveals they also provide powerful protection against influenza.
Published in Nature Immunology, the research found that beta-glucan—a soluble fiber found in mushrooms and other foods—acts as a flu barrier by limiting inflammation in lungs exposed to the infection.
The results were impressive: mice showed improved lung function and a lower risk of serious illness and death when infected with the flu.
While human trials are still needed, these findings offer real hope.
Beta-glucan is already known for boosting immunity, but the researchers wanted to test something different—it’s ability to minimize the harmful effects of influenza (called disease tolerance).
Unlike conventional treatments that try to kill the virus, beta glucan essentially reduces the impact of a viral attack on the body.
What makes beta-glucan truly unique is its ability to reprogram immune cells to better handle the flu. Treated mice had more neutrophils (immune cells), but these cells behaved in a more controlled manner than usual.
Instead of triggering the harmful inflammatory storm that typically causes severe flu symptoms, the body mounts a more measured, effective response—preventing the most serious complications.
The best part? You don’t need to wait for Big Pharma to turn this research into yet another overpriced pill. You can increase your beta-glucan intake today through common, affordable foods:
- Mushrooms: All varieties of mushrooms contain beta-glucans, with shiitake, maitake, and reishi being among the richest sources.
- Oats, barley, and rye: These whole grains are excellent sources.
- Seaweed: Brown algae like kelp, kombu, wakame contain significant amounts.
- Baker’s yeast: This single-celled fungus can be taken as a supplement.
- Wheat: The bran portion is particularly rich in beta-glucans.
- Algae: Species like Euglena gracilis, Chlorella, and Spirulina—offer these immune-supporting compounds.
We’re still waiting for human trials to confirm that beta-glucan has the same protective effects against flu in people as seen in mice.
But this soluble fiber has other health benefits, including reducing cholesterol and improving blood sugar control—so there’s every reason to add more of these safe, tasty, and affordable foods to your diet today.
P.S. Gut hack helps you avoid the flu.
Source:
Khan, N., Tran, K.A., Chevre, R. et al. β-Glucan reprograms neutrophils to promote disease tolerance against influenza A virus. Nat Immunol 26, 174–187 (2025).
Written By Dr. Scott Olson, ND
Nearly 25 years ago, failed mainstream medical treatments left Dr. Olson in constant pain – and his health in ruins. And that’s when he did something REVOLUTIONARY. He began his career in medicine – and dedicated his life to uncovering the true, underlying causes of disease.
Through his innovative medical practices in Tennessee and Colorado, Dr. Olson has helped cure countless seniors from across America of arthritis… heart disease… diabetes… and even cancer. All without risky prescription drugs or painful surgeries.
View More Free Articles
The 10,000 Steps LIE That's Ruining Your Health
I’ll be honest—I’m a little sick of the 10,000-steps theory. You know, the one that insists you need to take at least that many steps daily to stay healthy? You won’t believe where that claim originally came from. The 10,000-steps theory wasn’t handed down from the fitness gods on stone tablets. It originated from a...
“Brain Games” Failed You? Try THIS For Better Memory Instead
You know all those brain-training apps, supplements, and “miracle” memory-boosters that promise to keep your brain sharp as you age? Here’s the truth… There IS evidence they support brain health—and that’s why I’ll be the first to recommend them. But they aren’t the most powerful brain-boosting tool available to you. Another surprising solution has earned...
Mailbag: 5 Powerful Ways to Shield Your Prostate from Cancer
“What are your tips to avoid prostate cancer?” —Keeping Cancer at Bay Hi Keeping, You’re right to be concerned—prostate cancer is the second most common cancer among men in the United States. Approximately one in eight men will be diagnosed with prostate cancer during their lifetime. And there were an estimated 268,490 new prostate cancer...
Popular Drinks Quintuple THIS Deadly Risk
We all know that sugary drinks aren’t good for our teeth. But new research reveals a far more sinister link between sweetened beverages and oral health. Your soda habit could be putting you at risk for something far worse than cavities… Research published in JAMA Otolaryngology – Head & Neck Surgery has uncovered a shocking...
Depression AGES Your Body 30% Faster—Here's How to Stop It
Recent research highlights the profound connection between the mind and body. The eye-opening new study shows how battling depression could put you on the fast track to physical decline. Depression is the most common mental health condition worldwide. We’ve long known that it’s linked to an increased risk of illnesses, including heart disease and diabetes....
Study Reveals Not All Generic Drugs Are Created Equal
Like most folks, you probably don’t think twice about whether you’re getting a brand-name or generic drug when you pick up a prescription. After all, the FDA insists generics are just as safe and effective as their pricier brand-name counterparts. But what if that’s not always true? A disturbing new study has uncovered evidence that...
Feed Your Good Gut Bugs with this Produce Aisle Staple
Improving your health doesn’t always have to be complicated or expensive. Sometimes, it’s as simple—and tasty—as a handful of berries. We’ve long known that blueberries pack a serious nutritional punch. But this latest research takes things by revealing exactly how these berries enhance your gut microbiome—the community of beneficial bacteria living in your digestive system....
Harness the Forgotten Superpower of Boredom
From the moment we crawl out of bed in the morning until we hit the hay again at night, we’re bombarded with stimulation. With screens everywhere, including in our pockets, we’re surrounded by entertainment. But with constant notifications and endless scrolling, we’ve forgotten how to be bored. In fact, most of us avoid it at...
The Forgotten Nutrient That May Save Your Memory
Some nutrients, like vitamin D and vitamin C, get all the attention. But almost no one’s talking about vitamin K. However, this overlooked nutrient could be key to preserving your memory as you age. A study published in the Journal of Nutrition suggests vitamin K plays a critical role in keeping your brain sharp well...
Mailbag: The "Natural Navigator" Method for Finding Your Perfect Doctor
“I would like to know what questions are the best to ask when looking for a new naturopathic practitioner? How do I find the best naturopathic endocrinologist for my needs? Is it OK to see your naturopath virtually?” —Natural Navigator Hi Navigator, You’re asking some brilliant questions about finding the right naturopath (or, really, any...