Oyster Mushroom
Oyster mushrooms are a whole-food fungus providing protein, fiber, B vitamins, niacin, riboflavin, and vitamin D (when UV-treated). Generally safe; very rare allergic reactions.
What it is
Edible fungus (Pleurotus ostreatus) cultivated worldwide; characterized by oyster-shaped fan caps and mild flavor.
Used as a vegetable in stir-fries, soups, stews, and as a meat substitute due to its meaty texture.
Why it's flagged
- rare mushroom allergy
- may absorb heavy metals from substrate
What regulators actually say
"Mushrooms, oyster, raw - USDA FoodData Central provides full nutrient profile including protein, fiber, B vitamins."
"Mushrooms exposed to ultraviolet (UV) light contain vitamin D2 (ergocalciferol)."
Regulatory status
United States — FDA
Whole food; no specific regulation needed.
European Union — EFSA
Permitted; established culinary mushroom.
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