Do Shampoo and Conditioner Expire?

Shampoo and conditioner do expire, with both having similar shelf lives. Unopened bottles can last up to three years, while opened bottles should be used within 18 months or less, depending on the manufacturer's instructions or the absence of an expiration date.

Expired shampoos can lead to decreased efficacy, potential scalp irritation, and poor cleansing. If an expiration date is not present, you can use the following guidelines and observations to determine if your shampoo or conditioner is still safe to use:

• Check for an expiry date or "Period After Opening" (PAO) symbol.
• Inspect the appearance, smell, and texture; discoloration, separation of ingredients, or a rancid smell could indicate expiration.

It's also important to note that natural, preservative-free shampoos and conditioners may have a shorter shelf life. Proper storage, such as keeping bottles in a cool, dark place and avoiding excessive exposure to heat and light, can help maintain the shelf life of these products.

Not using expired shampoo and conditioner is crucial for both the efficacy of the products and the health of your scalp and hair.