A lot of the food we eat comes from nature, a place with a lot of creatures and dirt and stuff which can sometimes get into your food. The U.S. Food and Drug administration says it's "economically impractical" to produce food that's free of "non-hazardous, naturally occurring, unavoidable defects" and set up these guidelines for the amount of "defects" that can be in food without it being hazardous to your health.
1. Raisins with fruit fly eggs
2. Macaroni and rat hair
3. Moldy apples
4. Sandy peanut butter
5. Mushroom maggots
6. Tomato sauce with baby bugs
7. Crunchy spices
8. Chocolate covered bug legs
9. Wheat flour and mouse hair
The FDA says these defect levels are only the maximum that's allowed before food is considered "adulterated," and most food doesn't have that much rodent hair or insect fragments. And since you've been eating it your whole life, it can't be that bad, right?