Cordyceps coffee: a plain reading of the studies behind the endurance claims
Every mushroom coffee brand mentions Cordyceps and endurance in the same breath, and there is a reason: it is one of the few mushrooms with human exercise studies behind it. There is also a reason to be careful, which is that those studies are small, use amounts no coffee blend contains, and are cited far more confidently than the researchers themselves would put it. Here is what is actually there.
What Cordyceps is
The Cordyceps used in food products is almost always Cordyceps militaris, an orange, finger shaped fungus cultivated on grain or rice substrates. It is related to but not the same as Cordyceps sinensis, the wild caterpillar fungus from the Tibetan plateau that sells for thousands of dollars a kilogram and is far too scarce and expensive for a coffee. Cultivated militaris is what is in Mello Mushroom Coffee and the matcha, listed on the pack as part of the six mushroom blend. On its own it has a faintly savoury note that disappears entirely in milk.
Where the endurance story comes from
The origin is a 1993 press story about Chinese distance runners who broke records and whose coach credited a Cordyceps tonic among other things. That story is repeated everywhere and proves nothing on its own. The research that followed is what matters, and it is worth reading precisely.
The human studies
The most cited trial is from 2010: 20 healthy older adults, aged 50 to 75, took a Cordyceps sinensis extract or placebo for 12 weeks, and the extract group improved on a cycling threshold measure. A 2016 study gave 28 young adults a mushroom blend with Cordyceps militaris for one to three weeks and measured cycling performance, finding a small improvement after three weeks but not after one. A 2004 study of trained cyclists found no difference at all. That is roughly the shape of the evidence: a few small trials, mixed results, larger amounts than a coffee serve, and the more promising findings in older or untrained people rather than athletes. Research suggests something worth studying. It does not support the way the word endurance gets used on packaging, and our Cordyceps research page lists the trials so you can read them yourself.
What the studies measured
Mostly VO2 max, ventilatory threshold and time to exhaustion on a bike, measured in a lab. Some looked at blood markers. None of them measured how a person feels on a Tuesday morning after a coffee, and none used a coffee. If a product tells you its Cordyceps will make your run feel easier, that is a claim the research does not make.
What a Cordyceps coffee can honestly say
That it contains Cordyceps. That Cordyceps has a long history of use in East Asian traditions and a small, mixed research base in exercise science. That the coffee still tastes like coffee. Mello is a food, not a medicine, and Australian rules do not allow a food to claim it improves performance or any bodily function without evidence and approval the category does not have. We keep to that line on purpose. Our Cordyceps for training article goes through the studies in more detail for people who train.
The part that is real: the caffeine
If a mushroom coffee before a workout feels like it helps, the honest explanation is caffeine, which has decades of solid research behind it as a modest performance aid. A serve of Mello is about 48mg, about half a double shot, so it is a light pre workout dose rather than a strong one, and the smaller number is the reason it does not leave people wired an hour later. The mushrooms are the slow, daily, traditional part; the caffeine is what you feel.
How people use it
One serve about 30 to 45 minutes before a morning session, made with water or milk. Not two serves, and not on top of a pre workout powder that already has 200mg of caffeine in it. Our best time to drink mushroom coffee guide covers the pre workout timing question.
Who should be careful
Anyone with a mushroom allergy should avoid both Mello blends. Cordyceps has been studied for effects on blood sugar and blood clotting in laboratory work, which is a reason for anyone on medication for either, or managing a medical condition, to talk to a GP or pharmacist before adding an extract. The same applies to anyone pregnant or breastfeeding. The coffee blend contains coconut milk and MCT oil, so anyone with a coconut allergy should choose the matcha or skip both.
The short version
Cordyceps militaris is a cultivated mushroom with a small, mixed set of human exercise studies, most of them in older or untrained adults at amounts larger than a coffee serve. It is in the Mello blend for its traditional use and its place among the six, listed on the pack as one blend. A Cordyceps coffee can honestly say it contains the mushroom; the lift you feel before a workout is the caffeine.