Certain mushrooms, like portobello and shiitake, contain naturally occurring niacin. A cup of cooked mushrooms can provide up to 20% of your daily needs, depending on the variety.
Beyond B3, mushrooms offer other nutritional perks. They’re low in calories, rich in antioxidants, and may help support immune health. For plant-based eaters, they’re an easy way to add depth, flavor, and nutrients to a meal.

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