Jains generally do not eat mushrooms because of the core Jain principle of ahimsa (non‑violence) and the wish to avoid harming even very small life forms.

In simple points:

1. Mushrooms are living fungi

- They are not like fruits that grow on a plant and can be plucked without killing the plant. - Mushrooms themselves are counted as living beings, so eating them means directly using that life for our taste.

1. Many tiny life‑forms (anantkay bhav)

- Mushrooms usually grow in damp, decaying, or dirty places (on rotting wood, wet soil, manure, etc.). - Around and inside them there can be countless small organisms and micro‑life. - When we cut, wash, and cook mushrooms, many of these lives are harmed, which goes against Jain effort to do minimum himsa.

1. Difficult to clean properly

- Because of their texture and where they grow, it is very hard to clean mushrooms so that no tiny insects or micro‑organisms remain. - So a careful Jain prefers to avoid such doubtful items altogether.

1. Similar to rules for other “high‑life” foods

- Just like strict Jains avoid root vegetables (potato, onion, garlic, etc.) and some multi‑life vegetables (like cabbage, mushrooms, certain fungi), mushrooms are also avoided because they are considered to involve more violence compared to normal vegetables.

1. Practice in Jain community

- Among both Digambar and Shvetambar families, the common practice is not to eat mushrooms. - A few modern families may be more lenient, but traditional teaching strongly advises avoiding them to keep the diet as ahimsak (non‑violent) as possible.

You can read a bit more in a simple way here: “Can Jains eat mushroom” “Why do Jains can’t eat mushroom?”