(HealthDayNews) -- Mushrooms aren't a vegetable, but this doesn't mean the non-poisonous varieties aren't good for you, the U.S. Centers for Disease Control and Prevention says.

A mushroom is a fungus that creates more mushrooms by releasing spores. They're found all over the world and are an honored food in some cultures.

Mushrooms are brimming with protein, B vitamins and minerals, and are low in calories. Cooked fresh mushrooms are the most nutritious, the CDC says.

You should never harvest wild mushrooms since they may well be poisonous.