Toss Old Shampoo And Conditioner
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You surely can tell when a shampoo or conditioner goes “bad.” There’s usually a change in both smell and consistency. Manufacturers of shampoo and conditioner are not required by The Food and Drug Administration to print expiration dates onto packaging, but they are recommended that consumers ditch their bottles once they’ve been open for about 18 months, or even earlier if something weird is noticed.
The products can also spread bacteria onto your scalp, which opens the door for infection, not only are less effective at cleaning and conditioning at this age.
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