Cordyceps

Cordyceps is the strangest thing on this site. The fungus infects the buried larva of a ghost moth, consumes it from the inside, and then pushes a single slender club up through the soil.

What gets harvested is both halves together. The mummified caterpillar stays intact, pale tan and firm with its segments and legs still visible, and the dark club rises from the head end.

The club carries no gills and no pores.

Spores develop in flask-shaped chambers embedded just under its surface, which is an ascomycete arrangement rather than the gilled anatomy most of this site describes.

It grows only in high alpine meadow, above roughly three thousand meters, and only where its host moth lives. That combination is why it cannot simply be farmed the way an oyster mushroom can.

A specimen identifies itself, which is unusual, because nothing else looks remotely like a caterpillar with a stick growing out of its head.

The interior test is the one that matters commercially. A genuine specimen is packed with white fungal tissue, and a faked one made from molded dough or from a different insect is not.

The other identification problem is not in the meadow at all. Almost every product using this name contains a different fungus, and that is the subject of the taxonomy section below.

A second check separates a specimen from a convincing fake, and it is worth doing before money changes hands rather than after.

Genuine material breaks with a clean snap and shows solid white tissue right through the caterpillar, with no dark gut line and no hollow. A molded imitation crumbles or shows a seam, and an inserted wire is obvious the moment a specimen is bent, usually by weight before anything else.

It is worth understanding why the fakery is worth the effort. Wild caterpillar fungus trades by weight at prices that put it among the most valuable biological commodities on earth, so a few grams of added wire or dough returns more than the labor of making it.

That economics is also why powdered products are the harder purchase. A whole specimen can be snapped and inspected, and a powder can be anything, which is the practical argument for buying material you can still see the shape of.

This fungus has one of the most specific life cycles of any organism people collect.

Spores infect the larva of a ghost moth in the genus Thitarodes, which lives buried in alpine turf. The fungus grows through the larva over months, kills it, and mummifies it in an upright position near the soil surface.

In late spring the club emerges, pushes through the turf and releases spores, and that brief window is when collectors search.

The habitat is narrow in every direction. It needs high altitude, the right turf, the right moth, and a climate found across the Hengduan mountains and the Himalaya and almost nowhere else.

That specificity has an economic consequence that is hard to overstate. In one district of far-western Nepal, a study of the medicinal product trade found that this single species accounted for 85 percent of total trade value, and that the district's trade value rose 17.2-fold over seventeen years.

Ground like that is the whole supply constraint, because it cannot be extended and it cannot be substituted.

A harvest that valuable in a habitat that narrow creates obvious pressure, and sustainability is an active question rather than a hypothetical one across the whole range.

Cordyceps is not cooked and not eaten as food in any ordinary sense.

Wild specimens are used whole, most often simmered into broths and soups, in preparations where the material is treated as an expensive addition rather than an ingredient with a flavor of its own.

The cultivated orange species is different in kitchen terms. It is soft enough to be handled like a mushroom, and it appears in broths and teas, though it is still not a vegetable anybody eats a plate of.

Extraction is the usual route for both, and how a preparation is made changes what reaches a person, which is covered on the page about powder against extract.

Cordyceps is sold hardest for stamina, and the human trials point somewhere narrower than the marketing.

A double-blind placebo-controlled trial gave 20 healthy adults aged 50 to 75 a fermented preparation designated Cs-4 for twelve weeks. Their metabolic threshold rose 10.5 percent and their ventilatory threshold rose 8.5 percent, with no change in either measure on placebo.

The same designated product was then given to 22 endurance-trained male cyclists at three times the dose for five weeks. Peak oxygen uptake, ventilatory threshold and a work-based time trial were all unchanged, and the authors concluded it had no effect on aerobic capacity or endurance performance in trained cyclists.

Set against each other, those two results say something narrower than either says alone. Two submaximal thresholds moved in untrained older adults, nothing moved in trained athletes at triple the dose, and maximal oxygen uptake never moved in anybody.

It is also worth naming what neither trial used.

Both were run on the fermented laboratory preparation rather than on wild caterpillar fungus or on cultivated orange clubs, so the evidence attaches to the third material and not to the two people actually buy.

What would change the picture is a trial in untrained adults using material a shopper can obtain, powered for the outcome people care about, and large enough not to be described as a pilot. That study does not exist yet.

The population is doing the work in that comparison, not the dose. The fuller audit of what this evidence supports sits on the page about mushrooms and athletic performance.

The wild species has never been cultivated at scale, and that failure is the reason the trade looks the way it does.

Growing it would mean rearing the host moth through a multi-year larval stage at altitude and then infecting it, which has been achieved experimentally and never economically.

What is farmed instead is the orange species, Cordyceps militaris, and it is genuinely easy. It fruits on sterilized grain in a jar within weeks, needs light to color properly, and is produced in bulk.

Anybody comparing products is really comparing which of those three processes made the contents, and that is more useful than which brand printed the jar, which is what choosing a supplement turns on.

There is no useful nutrition table for cordyceps, because none of the three materials is a food.

The wild specimen is dead insect tissue packed with fungal material, consumed in gram quantities at most and priced in a way that rules out eating it for nutrients. The cultivated orange species is closer to an ordinary mushroom in composition, and it is still used as a small addition rather than a portion.

What is actually measured in this literature are extractable fractions, and their amounts differ between the three materials and between growing conditions, so a figure quoted for cordyceps describes one preparation rather than the name.

One common name covering three materials is the central fact about this fungus, and it is worth setting out plainly.

Ophiocordyceps sinensis is the wild caterpillar fungus of the Himalaya and the Tibetan plateau. It was long placed in the genus Cordyceps and moved to Ophiocordyceps, so older sources use the other name for the same organism.

Cordyceps militaris is a separate species entirely. It parasitizes other insects, it grows readily on grain, it produces bright orange clubs, and it is what almost every affordable product contains.

For a reader checking evidence, the practical rule is to find the species and the preparation in the methods section of a study, and then to ask whether the product in hand matches both.

The genus move is worth knowing when reading older sources. What is now Ophiocordyceps sinensis appears throughout earlier literature and much current marketing as Cordyceps sinensis, which is the same organism under a superseded name.

That leaves a trap in plain sight. A label reading Cordyceps sinensis is using the old name for the wild species, and a label reading Cordyceps militaris is naming a different species entirely, and the two differ by one word.