In 1993, three Chinese runners shattered world records at the National Games in Beijing, prompting accusations of doping. Their coach attributed their performance to a training regimen that included a peculiar ingredient: cordyceps mushroom. While the full picture was undoubtedly more complex, that moment put cordyceps on the global stage — and decades later, this vibrant orange fungus remains one of the most popular natural products among athletes and active individuals.
What Is Cordyceps?
Cordyceps is a genus of parasitic fungi with a life cycle that sounds like science fiction. In the wild, Cordyceps sinensis infects caterpillar larvae high in the Tibetan Plateau, eventually consuming the host and producing a slender fruiting body that emerges from the ground. This wild form — known as "caterpillar fungus" or dong chong xia cao ("winter worm, summer grass") in Chinese medicine — has been used for centuries to support energy and vitality.
But here's the good news for both your conscience and your wallet: the cordyceps used in modern mushroom products is overwhelmingly Cordyceps militaris, not C. sinensis. There are important differences between the two.
Cordyceps sinensis grows exclusively in the wild at high altitude, primarily in Tibet, Nepal, and Bhutan. It's one of the most expensive natural products in the world — often exceeding $20,000 USD per kilogram. Wild harvesting has led to significant ecological concerns, and much of what's sold as "C. sinensis" product is actually mycelium grown on grain, which may contain very different compound profiles.
Cordyceps militaris can be commercially cultivated on nutrient-rich substrates in controlled environments. Crucially, cultivated C. militaris produces actual fruiting bodies — the bright orange, club-shaped mushrooms — and research shows these contain equal or higher concentrations of key bioactive compounds compared to wild C. sinensis. All Nature Lion cordyceps products use cultivated C. militaris fruiting bodies grown right here in Canada.
Key Bioactive Compounds
The primary compounds driving cordyceps research include:
Cordycepin (3'-deoxyadenosine): The signature compound of cordyceps, cordycepin is structurally similar to adenosine — a molecule that plays a central role in cellular energy transfer (ATP). Research suggests cordycepin may influence multiple biological pathways related to energy metabolism, inflammation, and cellular function. Notably, C. militaris fruiting bodies typically contain significantly higher cordycepin levels than C. sinensis.
Adenosine: Cordyceps contains adenosine itself, which is involved in ATP (adenosine triphosphate) production — the fundamental energy currency of every cell in the body.
Beta-Glucans: Like other medicinal mushrooms, cordyceps contains immunomodulatory beta-glucans that may support balanced immune function.
Polysaccharides: Various polysaccharides in cordyceps have been studied for their effects on endurance, oxygen utilization, and recovery.
Research on Athletic Performance and VO2 Max
Cordyceps' reputation as a performance enhancer isn't just anecdotal — there's a growing body of research supporting the connection.
VO2 Max: A 2016 randomized, double-blind, placebo-controlled study published in the Journal of Dietary Supplements found that daily use of a Cordyceps militaris extract for three weeks significantly improved VO2 max (maximal oxygen consumption) in young adults. VO2 max is widely considered the gold standard measure of aerobic fitness. The study used a cycling test and found meaningful improvements in the cordyceps group compared to placebo.
Endurance and Time to Exhaustion: Research published in the Chinese Journal of Integrative Medicine demonstrated that cordyceps may improve time to exhaustion during high-intensity exercise. This suggests cordyceps could help athletes push through fatigue barriers during training and competition.
Oxygen Utilization: A 2010 study in the Journal of Alternative and Complementary Medicine found that older adults taking cordyceps showed improvements in oxygen utilization during exercise. This is particularly relevant for understanding how cordyceps may benefit not just elite athletes but everyday active individuals.
It's important to note that not all studies have found positive results. A 2020 study in the Journal of Dietary Supplements found no significant improvement in endurance performance in trained cyclists. The research community generally agrees that more large-scale, long-term human trials are needed to establish definitive performance claims. Individual responses may vary based on training status, dosage, duration of use, and other factors.
Energy and Fatigue
Beyond athletic performance, many people turn to cordyceps for general energy support. The proposed mechanism relates to ATP production — cordyceps compounds may support more efficient cellular energy generation.
A 2010 randomized, double-blind study published in Evidence-Based Complementary and Alternative Medicine found that elderly subjects taking cordyceps extract for 12 weeks reported significant improvements in energy, fatigue resistance, and feelings of cold intolerance compared to placebo.
What makes cordyceps particularly appealing as an energy product is that it doesn't work like caffeine. There's no jittery spike followed by a crash. Instead, cordyceps appears to support sustained, even energy by helping cells produce and utilize energy more efficiently. Many of our customers describe it as feeling like they have "more in the tank" rather than being wired or overstimulated.
This makes cordyceps a natural companion to coffee rather than a replacement. Some athletes stack cordyceps with their morning coffee for a combination of immediate alertness and sustained endurance.
Lung Function and Respiratory Health
Cordyceps has a long history in traditional Chinese medicine as a tonic for the lungs and respiratory system. Modern research has begun to explore these traditional claims.
Studies suggest that cordyceps may support respiratory function by improving oxygen utilization in the lungs. A 2008 review in The American Journal of Chinese Medicine examined the evidence for cordyceps' effects on respiratory health and found promising results in clinical studies involving subjects with respiratory challenges, though the reviewers called for more rigorous trials.
For active individuals, improved respiratory efficiency may translate to better performance at altitude or during intense cardiovascular exercise. Some mountaineers and high-altitude athletes have adopted cordyceps for this reason.
How Athletes Use Cordyceps
Athletes typically integrate cordyceps into their routines in the following ways:
- Pre-workout: Taking cordyceps 30–60 minutes before training to support energy and oxygen utilization during the session.
- Morning routine: A daily dose with breakfast to support sustained energy throughout the day.
- Training block use: Using cordyceps consistently over a 4–8 week training block rather than as a one-off, since the effects appear to build with consistent use.
- Stacking: Combining cordyceps with lion's mane for cognitive focus during training, or with a 5 Mushroom Blend for comprehensive support.
Dosage and Timing
Most research has used dosages between 1 and 3 grams of cordyceps extract per day. Start at the lower end and increase based on your response.
Best time to take cordyceps: morning or pre-workout. Unlike reishi (which is best in the evening), cordyceps' energizing properties make it ideal for the first half of the day. Taking it too close to bedtime may interfere with sleep in some individuals, though this varies.
For athletic performance goals, take cordyceps at least 30 minutes before exercise. For general energy support, take it with your morning meal or coffee.
Product Formats
Powder: Cordyceps Powder is our most versatile option. It has a mild, slightly sweet flavour that blends easily into smoothies, coffee, or pre-workout shakes. Made from hot-water extracted C. militaris fruiting bodies for maximum bioavailability.
Tincture: The Cordyceps Tincture offers a concentrated, dual-extracted liquid format. It's convenient for pre-workout use — just add a dropper to your water bottle. The dual-extraction process captures both water-soluble polysaccharides and alcohol-soluble compounds like cordycepin.
Capsules: Cordyceps Capsules deliver a precise, consistent dose without any preparation. Perfect for athletes who want to dial in their routine without measuring powder. Toss them in your gym bag and take them on the way to training.
Who Should Consider Cordyceps?
Cordyceps may be worth exploring if you're an athlete looking for natural performance support, someone dealing with fatigue or low energy, or anyone interested in supporting respiratory health. Its stimulant-free energy support makes it appealing for people who want sustained vitality without the downsides of caffeine dependence.
As with all new products, consult your healthcare provider before starting cordyceps, particularly if you're taking blood-thinning medications or immunosuppressants.
Explore More
To learn about the differences between mushroom formats, check out our Powder vs Capsules comparison. If you're interested in combining cordyceps with other functional mushrooms, our 5 Mushroom Blend guide explains how these species complement each other.
All Nature Lion cordyceps products are made from Canadian-grown Cordyceps militaris fruiting bodies in our CFIA-licensed facility in Brantford, Ontario. No mycelium on grain, no fillers — just the fruiting body, properly extracted and tested for potency.