Does Shampoo Go Bad?
How shampoo expires and what to do with shampoo that has gone bad. The shampoo has an expiration date because it can become breeding grounds for bacteria after it has been opened. It is important to keep track of the expiration date and to discard shampoo that has gone bad. There are some ways to prevent your shampoo from going bad, but it is also important to be vigilant about the condition of the product.