What are magic mushrooms? A plain-English guide

Search for what magic mushrooms are and you get slang, folklore and sales talk. This guide sticks to what published sources show. In short, magic mushrooms are mushrooms that contain psilocybin and its relative psilocin; Health Canada says these are the active ingredients, and that there are over 200 species (Health Canada).

This is the hub page for our cluster on the history and science of magic mushrooms. It covers the words people use, the chemistry in plain English, where the fungi grow, what researchers are studying and the basics of the law in Canada. Each part points to a deeper article. It is not a guide to using, finding, growing or identifying mushrooms.

What does “magic mushrooms” actually mean?

It is an everyday name, not a scientific one. Researchers talk about psilocybin-producing fungi instead. A 2022 survey of the literature lists the genera in which psychotropic mushrooms are found: Psilocybe, Panaeolus, Pluteus, Gymnopilus, Pholiotina, Galerina and Inocybe, spread across the world (Gotvaldová et al., 2022). A genus is a group of related species.

Psilocybe is the genus most people mean. A 2024 study of its family tree concluded that psilocybin first arose in Psilocybe, with four or five possible transfers of the genes to other mushrooms between 40 and 9 million years ago (Bradshaw et al., 2024). Evidence: preliminary, since the gene cluster had been worked out in only five of about 165 Psilocybe species.

Counts of species vary with how the genus is drawn. A 2022 paper says the genus in the broad sense is estimated at 277 to 326 species, and 144 turn blue when damaged (Bradshaw et al., 2022). That study also found that some older Psilocybe names belong to Deconica, a genus it calls nonpsychoactive. Health Canada’s “over 200 species” sits inside these estimates (Health Canada).

A 1957 Life magazine story used the phrase in its title (see below). The point here is simpler: “magic mushroom” tells you what a mushroom is said to contain, not what it is.

Species, and what a “strain” is

A species has a two-part Latin name. Psilocybe cubensis is the best-studied one, and many of the papers we cite worked on it. A 2023 genome study says it was domesticated from its niche in livestock dung for the production of psilocybin (McTaggart et al., 2023).

“Strain” is not a scientific rank. In the papers, strains are named lines of one species. A 2026 study grew 14 P. cubensis strains obtained from commercial suppliers, then checked by DNA sequencing that they were all the same species (Sharchaton et al., 2026). A 2023 study compared the genomes of 86 commercially available cultivars with 38 Australian isolates, and found the cultivars had low genetic diversity, with hallmarks of selfing and clonal propagation (McTaggart et al., 2023). Evidence: established for what these studies found.

In other words, a strain name is a label that growers and sellers use. There is no formal registry behind it that we could find. The story of one famous label is in our guide to the Penis Envy strain name.

What are psilocybin and psilocin?

Psilocybin and psilocin are the two main hallucinogenic compounds of these mushrooms (Dinis-Oliveira, 2017). A short chemistry lesson helps here. Psilocybin carries a phosphate group, a small chemical tag. In the body, an enzyme called alkaline phosphatase removes the tag and leaves psilocin (Dinis-Oliveira, 2017).

That is why the same review calls psilocybin primarily a prodrug: a compound that has to be converted before it is active. Evidence: established. The mushroom can run the same step itself. In Psilocybe cubensis, an enzyme called PsiP strips the phosphate off, and the authors suggest the tag may serve a protective function (Lenz et al., 2020).

How do they act on the brain?

A receptor is a docking site on a cell. The reviews describe psilocybin and psilocin as agonists or partial agonists at the serotonin 2A receptor, also called 5-HT2A (Dinis-Oliveira, 2017). “Agonist” means the compound switches the receptor on, fully or partly. A 2016 review says there is now a consensus that psychedelics act this way at 5-HT2A receptors in the brain (Nichols, 2016). Evidence: established as the leading explanation.

Mushrooms hold more than these two. A 2026 study measured six related compounds in P. cubensis, among them psilocybin, psilocin, baeocystin and norpsilocin (Sharchaton et al., 2026). We do not describe the experience here: this page is not an effects or dosing guide.

Where do magic mushrooms grow?

Widely. The 2022 survey says psychotropic mushrooms are distributed throughout the world. Most feed on dead material (they are saprotrophic), and some live in partnership with other organisms (Gotvaldová et al., 2022).

Habitats differ by lineage. The 2024 family-tree study suggests Psilocybe began as a wood-decomposing group that moved to soil, with two separate lines that later specialized on herbivore dung. It lists P. cubensis and Panaeolus cyanescens as dung-loving (Bradshaw et al., 2024). Evidence: preliminary. The authors say key species still need adding.

P. cubensis also travels. The 2023 genome study found that the Australian population is naturalized: it was introduced from an unknown centre of origin and is now established (McTaggart et al., 2023). This section is a map of the science, not a field guide. See the warning below.

How were magic mushrooms named and used?

Long before any lab, Indigenous peoples had their own relationships with these mushrooms. A 2024 annotated bibliography gathers 49 texts on psilocybin mushroom practices developed by Indigenous peoples, including contemporary practices and evidence of historical uses in Mexico and other regions (Spiers et al., 2024).

Outsiders came later. The 13 May 1957 issue of Life magazine carried a story titled “Seeking the Magic Mushroom”, by the banker R. Gordon Wasson (Life, 1957). In March 1958, Albert Hofmann and colleagues reported psilocybin from the Mexican mushroom Psilocybe mexicana in the journal Experientia (Hofmann et al., 1958). Evidence: established for these dates and titles.

Who discovered what, who was credited and who paid the cost is a bigger story. Our history of magic mushrooms follows it from Mesoamerica to María Sabina, the chemists, prohibition and modern trials. For Canada’s side, read surprising stories of psychedelic Toronto.

Why do magic mushrooms turn blue?

Damage lets two enzymes get to the psilocybin. One removes the phosphate to make psilocin; the other oxidizes psilocin, and the pieces link into blue chains (Lenz et al., 2020). Evidence: established for P. cubensis.

The colour is a weak guide to anything else. In a 2025 study, frozen mushrooms turned deep blue on thawing, but the authors wrote that this bluing does not necessarily correlate with psilocin levels (Windsor et al., 2025). Many other mushrooms bruise blue through unrelated chemistry. The full story is in why do magic mushrooms turn blue.

Do strain names tell you how strong a mushroom is?

Not reliably. Evidence: established. Compound levels vary even inside one species. A 1982 study of cultivated P. cubensis found psilocybin varied by a factor of four across harvests from one culture, and by over a factor of ten between samples from outside sources (Bigwood and Beug, 1982).

A 2026 study repeated the test with modern strains. Grown under identical lab conditions, the 14 strains differed more than 7.8-fold in total tryptamines. Single mushrooms of the same strain also differed, by between 12.81% and 23.39% (as a coefficient of variation) in psilocybin. The authors concluded that species and strain identification alone cannot predict the psychoactive content (Sharchaton et al., 2026).

That is why we do not rank, compare or recommend strains. A label describes a line a seller says it grew. It does not tell you what is in the next mushroom.

What are researchers studying, and what is proven?

Psilocybin is being studied as a possible treatment for conditions such as depression. That is not the same as proof. Health Canada says clinical trials are the most appropriate and effective way to advance research with psilocybin, and that there are no approved therapeutic products containing psilocybin in Canada or elsewhere (Health Canada).

The results so far are mixed. In a phase 2 trial of treatment-resistant depression, the highest dose beat a control dose on the main measure at 3 weeks, but not on the sustained-response measure at 12 weeks. Adverse events occurred in 77% of participants, and suicidal thoughts, behaviour or self-injury appeared in all dose groups. The authors called for larger and longer trials (Goodwin et al., 2022).

A German trial published in 2026 did not show a significant difference on its first main comparison, though the authors describe exploratory signals (Mertens et al., 2026). And one review argues that effect sizes in these trials are likely over-estimated, because participants often work out whether they got the drug, and expectations colour their reports (Muthukumaraswamy et al., 2021).

The last row comes from the 2022 DNA study, which says even the functional role of psilocybin and psilocin under natural conditions remains a mystery (Bradshaw et al., 2022).

Are magic mushrooms legal in Canada?

Psilocin and psilocybin are listed in Schedule III of the Controlled Drugs and Substances Act (Justice Laws). Health Canada says the production, sale and possession of magic mushrooms are illegal in Canada, and lists clinical trials and the Special Access Program as legal routes for therapeutic access (Health Canada).

The Special Access Program is a medical-access route, not a way to buy mushrooms. Through it, a health or dental practitioner can request a drug that is not for sale in Canada, for a serious or life-threatening condition where conventional treatments have failed or are unsuitable or unavailable (Health Canada, Special Access Program).

This is general information, not legal advice. Rules and enforcement change, so check the official pages linked here before relying on any summary, including ours.

Safety at a glance

Health Canada lists risks of these substances, including anxiety, panic and paranoia, and notes that mixing them with other substances can have serious consequences (Health Canada). Our safety page keeps the key numbers and information in one place. We do not give use or dosing guidance.

Where to go next

• The history of magic mushrooms: from Mesoamerica and María Sabina to Life magazine, Hofmann’s psilocybin, prohibition and today’s trials.
• Why do magic mushrooms turn blue?: the two enzymes, the blue chains and why colour is no guide to strength or safety.
• The Penis Envy strain name: how one strain label got its name, and what the genetics studies do and do not show.
• Surprising stories of psychedelic Toronto: the city’s research, street scene and public inquiry.

Stay curious, and check the date on this page. We update it when the sources change.

Shroomverse sells mushroom products. This article is general information about what magic mushrooms are. It is not medical, legal or identification advice, and it does not recommend any product.