Cordyceps Sinensis vs Militaris: Two Fungi, Two Supply Chains

They are two different fungi that stopped being close relatives in 2007, when a large phylogenetic study broke the genus Cordyceps apart. The caterpillar fungus of the Tibetan Plateau is now published as Ophiocordyceps sinensis; Cordyceps militaris stayed put and became the type species of the family built around it. One is wild-harvested at altitude and extremely expensive. The other is grown in trays.

That difference in supply chain, not any difference you can taste, is what drives how the two appear on supplement labels. A pack that says only "Cordyceps" is withholding the single most informative word on the panel.

The 2007 split, and why the names moved

Sung, Hywel-Jones, Spatafora and colleagues published a phylogenetic classification of Cordyceps and the clavicipitaceous fungi in Studies in Mycology in 2007, sampling 162 taxa across five to seven gene regions including nrSSU, nrLSU, tef1, rpb1 and rpb2. Their results, in the paper's own words, "reject the monophyly of both Cordyceps and Clavicipitaceae".

Practically, the genus as it then stood was holding fungi that were not each other's closest relatives. The paper validated the family Cordycipitaceae on the type of Cordyceps, which is C. militaris, and erected the family Ophiocordycipitaceae alongside new genera. The caterpillar fungus moved out of Cordyceps and the combination Ophiocordyceps sinensis is what the current research literature uses, including the metabolomics work cited below.

The consequence for a label is not pedantry. Two species in two families, with different hosts and different cultivation, are not interchangeable raw materials, and a product that names neither has told you nothing about which it bought.

Where each one comes from

The price gap follows from that. Reporting on work by Hopping, Chignell and Lambin published in PNAS, Stanford University stated that high-quality pieces of the caterpillar fungus sold for more than $140,000 per kilogram in Beijing in 2017. The same study interviewed 49 collectors across the Tibetan Plateau and drew on roughly 400 location records from China, Bhutan, Nepal and India going back to the 1970s, reporting that production is already declining under intensive harvesting, with average winter temperatures in some areas up by as much as 4 °C since 1979.

Nothing comparable applies to the cultivated species. Lu, Zhi, Miyakawa and Tanokura, profiling natural and cultured Cordyceps by NMR spectroscopy in Scientific Reports in 2019, describe O. sinensis as thriving in those alpine meadows at 3,000 to 5,000 m and as "rare and hard to obtain", while their cultured C. militaris was grown on a silkworm chrysalis medium or a rice medium.

Cordycepin: the compound the two are usually compared on

The same 2019 paper reports the chemical difference most often quoted. Cordycepin "showed a 5-fold higher concentration in C. militaris than in O. sinensis". Within the cultivated species, a process where the silkworm chrysalis medium was disinfected before seeding produced cordycepin three-fold higher than in natural C. militaris.

State the limitations plainly. That is a metabolic profiling study by NMR on a small set of samples, reporting fold-changes rather than absolute mg/g figures in the text, and it measures what is in the fungus, not what happens in a person. No human outcome was studied and none should be read into it.

How to read a Cordyceps label

Five questions do most of the work, and a panel that answers all five is doing better than most of the category.

1. Which species? If the label says only "Cordyceps", that is the question it has avoided.
2. Fruiting body or mycelium? These are different parts of the organism and different manufacturing routes.
3. If mycelium, grown on what? Mycelium cultured on grain is often sold with the grain substrate still in it, which dilutes the fungal material.
4. How much per daily portion? In milligrams, next to the stated portion, not in the marketing copy.
5. What does the extraction ratio mean here? A figure like 10:1 describes how much raw material went in, not how much of any measured compound came out.

That last one catches a lot of people. An extraction ratio is a process description. Without a quantified marker compound it cannot be compared across two brands, and most packs do not publish one. For the wider version of this problem across fungal ingredients, see our notes on how Cordyceps is studied in the laboratory and on what the Lion's Mane research has actually measured.

What Chaski uses

Chaski Cacao contains Cordyceps sinensis, as mycelium. It does not use C. militaris. The Lion's Mane in the same formulation is a fruiting body extract rather than mycelium, which is a deliberate difference between the two ingredients and one worth stating because the category routinely blurs it.

The rest of the tube: 600 g of 77% dark chocolate buttons, a daily dose on the pack of four buttons, single-origin Peruvian and Ecuadorian cacao from a farm our founder has visited, ground at low temperature, sweetened with coconut sugar, with no added cane sugar, no emulsifiers, no seed oils and no palm oil. Every batch is tested for lead, cadmium and pesticides. The ingredient panel is on the Chaski Cacao product page, and the rest of the library in our guides, including the portion conventions used for Cordyceps in the category.

If a pack you are holding does not name the species, email the seller and ask. The answer, or the silence, tells you what you need.

Sources

1. Sung G-H, Hywel-Jones NL, Sung J-M, Luangsa-ard JJ, Shrestha B, Spatafora JW, Studies in Mycology, 2007;57:5–59
2. Lu Y, Zhi Y, Miyakawa T, Tanokura M, Scientific Reports, 2019;9:7735
3. Stanford University news release reporting Hopping KA, Chignell SM, Lambin EF, PNAS, 2018