Myth
Fungi are plants that lost chlorophyll.
Reality
They are a separate kingdom closer to animals, with chitin walls and external digestion.
Folk taxonomy lumps yeast, mushroom and 'germ' together. The kingdom is older and stranger than a grocery aisle.
Myths below are common queries. They do not identify a wild mushroom and they are not medical advice.
Myths vs evidence
Myth
If an animal eats a mushroom, people can.
Reality
Many toxins are species-specific. Identification is local expertise, not folklore.
Myth
All indoor mould is toxic black mould.
Reality
Colour is a poor ID. Health risk depends on species, dose, building moisture and the person.
Myth
Yeast infections mean you are dirty.
Reality
Yeasts are normal residents. Blooms often follow moisture, hormones or antibiotics.
Myth
Antibiotics kill fungi the way they kill bacteria.
Reality
Most antibacterial classes miss fungal cells. Antifungals are a different toolbox and need clinical judgment.
Myth
A probiotic mushroom powder replaces a varied diet.
Reality
No powder outruns sleep, fibre and not living in a damp sealed box. Food fungi are food, not magic.
If a claim says every mould is deadly or every mushroom is a superfood, both flatten a kingdom.
Keep exploring
More in Tree of microbes
Bacteria
Single-celled prokaryotes with cell walls ? the oldest widespread life form, and both partners and pathogens.
Familiarity 95Viruses
Packets of DNA or RNA that are not cells — they replicate only inside living hosts.
Familiarity 96Archaea
A prokaryotic domain that is not bacteria — methanogens, extremophiles and no known human pathogens.
Familiarity 35Bacteriophages
Viruses that infect bacteria — Earth's most abundant biological entities, and a concept-level idea in medicine.
Familiarity 42Protozoa
Motile unicellular eukaryotes — a teaching grade that includes pond ciliates and a minority of serious parasites.
Familiarity 58