Should You Swap Out Your Shampoo and Conditioner Regularly? You’ve probably heard that you need to change shampoos every once in a while. Conventional wisdom says that your hair “gets used to” or “becomes immune to” the effects of the formula of whatever shampoo you’re using. There’s no proof to the myth that your hair builds up ‘resistance’ to certain products over time. However, if you were to use one shampoo and conditioner over the space of a year, there would be months when your hair would feel nourished and......
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