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Sun Your Mushrooms

Mushrooms make vitamin D in sunlight, just like we do. A spell in the midday sun can raise their vitamin D a lot.

The hack

Mushrooms contain ergosterol, which UV light turns into vitamin D2. Most supermarket mushrooms are grown in the dark and contain very little — but you can change that.

Do this

  1. Slice mushrooms and lay them out gill side up.
  2. Leave them in direct midday sunlight for 15–60 minutes.
  3. Cook and eat them as usual — the vitamin D stays put.

Or buy mushrooms labelled “UV-treated” / “high in vitamin D”.

Keep in mind

Sunned mushrooms are a helpful extra, not a guaranteed source. In winter or if you rarely get sun yourself, a vitamin D supplement is the reliable option — see Vitamin D.

Written with AI assistance.