How to Know If Your Shampoo is Expired

Here are some ways to check if a shampoo has expired:

1. Check the expiration date: Look for a "Period After Opening" (PAO) symbol or an expiration date on the label.

2. Check the packaging: Inspect the packaging for any visible signs of damage, such as cracks, dents, or rust.

3. Look for changes in texture or smell: If the shampoo has thickened, thinned, or developed an unusual odor, it may have gone bad.

4. Check the color: If the shampoo has changed color or has visible sediment, it may have expired.

5. Check the pH level: If the shampoo has a significantly different pH level than usual, it may have gone bad.

Typically, shampoos expire:

- 2-3 years after manufacture (unopened)

- 1-2 years after opening (depending on storage conditions)

If you're unsure, it's best to err on the side of caution and discard the shampoo to avoid any potential irritation or infection.

Remember, always store your shampoos in a cool, dry place, away from direct sunlight and heat sources to help extend their shelf life.