Why do common household items (shampoo, toothpaste, medicine, etc.) have expiration dates and what happens once the expiration date passes?

Question

Why do common household items (shampoo, toothpaste, medicine, etc.) have expiration dates and what happens once the expiration date passes?

In: Other

Answer 1

Cosmetics are tested using stability testing. You generally don’t want to use cosmetics past the exp date as the preservative system can lose strength over time. Spreading something filled with microbes over your skin can make you sick if it gets in a cut etc