Wild Harvest, Conservation and Sustainability of Medicinal Fungi

Some medicinal fungi are still gathered from the wild. When demand rises, that can put pressure on the fungus and on the people who gather it. This page summarizes what the sources we read say. It is not a guide to finding, identifying or collecting any fungus, and none is given. Never eat a wild mushroom because of a photo or an app; if someone has, call Poison Help at 1-800-222-1222 in the US, or 911 for collapse, seizure or severe vomiting with confusion. See Plant and Mushroom Poisoning.

Caterpillar fungus (Ophiocordyceps sinensis)

Himalayan caterpillar fungus has become one of the world's most valuable biological commodities, and it provides a crucial source of income for hundreds of thousands of collectors. [1] It is also described as an invaluable part of traditional Chinese medicine. [2]

What a 2018 study found. The researchers combined collectors' local knowledge with ecological modeling. According to collectors across four countries, production has decreased due to habitat degradation, climate change and especially overexploitation. [1] Their statistical models agreed that climate change is contributing, and they concluded that the fungus has been negatively affected by a combination of overexploitation and climate change. [1] Harvesting is not the only threat, in other words.

What a 2025 review says. A review of its conservation status describes unchecked overexploitation threatening its long-term survival in the Himalayan region. [2] Another review says the fungus is severely harvested in India and highlights a shift toward sustainable artificial cultivation. [3]

Price and substitution. A study of traditional medicine prices notes that when prices are high there is a greater incentive to use cheaper substitute species or adulterants. [4] It also notes that price levels influence the viability of farming versus wild harvest. [4] For shoppers this is one reason labels need care; see Mushroom Supplement Adulteration.

Chaga (Inonotus obliquus)

A cancer center states that natural reserves of chaga have nearly been exhausted and that scientists are seeking to develop cultivated substitutes. [5] We did not find a second source on the size or cause of that pressure, so we cannot say more about how widespread it is. A review of chaga's traditional and medicinal uses describes a long history of traditional use. [6] A cultivated substitute is not automatically equivalent to the wild product; no source we read compared them for health effects, so "Proper evidence not found".

Cultivation as an alternative

Cultivated Cordyceps militaris is discussed as an alternative to wild O. sinensis. [3] It is a different species, so a result for one cannot be moved to the other. See Cordyceps militaris vs Ophiocordyceps sinensis.

People and livelihoods

Hundreds of thousands of collectors depend on caterpillar fungus income. [1] Sherpa communities in Xizang, China also documented the fungus among their traditional medicines. [7] We did not find sources describing benefit-sharing arrangements, certification schemes or trade rules for medicinal fungi, so we do not describe them. "Not described in the sources we read" is not the same as "none exist".

What a reader can do

• Look for labels that name the species and part, and tell your pharmacist what you take. See How to Read a Mushroom Supplement Label.
• Be aware that very rare or costly ingredients are more likely to be substituted. [4]
• Ask the seller or a local authority about sourcing if it matters to you. We do not list sellers.

Safety still applies: supplements may interact with medicines or carry risks before surgery or with some conditions. [8]