Can You Wash Your Hair With Expired Shampoo?

Like other beauty products, shampoo does have a shelf life. So, how do you know if it’s OK to use that half-empty bottle of shampoo you’ve had stashed under the sink since last year?

A woman, seen from the neck up, looks at her wet hair in the shower.
Credit: Natalia Riabchenko/ iStock via Getty Images
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