According to Gina Rivera, founder of Phenix Salon Suites, expired shampoo can directly affect your scalp, leading to itching and irritation. “Expired products undergo a chemical change,” explains Rivera to Health line, “meaning that they are no longer highly effective.” And if the shampoo you’re using is organic or sulfate-free, this can often lead to a shorter shelf life. “This is due to a lack of preservatives and added healthful ingredients,” she said.
If you don’t experience irritation from an expired shampoo, you’ll notice that the results it used to have on your hair will completely disappear. You’re essentially putting something in your hair that’s essentially doing nothing with it. And on a rare occasion, according to Craze style, there may also be some “bacteria or fungi that grow invisible to the naked eye”, which can also lead to irritation on your scalp and skin. Sorry!
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