Shower gels are formulated to have milder surfactants than shampoos. Therefore, if you have a shower gel that makes your skin feels soft and conditioned rather than squeaky clean, you can absolutely use it as a shampoo. It is quite similar to using a 2-in-1 shampoo.
Should you do it?
I haven't tried it yet but next time I am on holiday and can't find a sulfate-free shampoo I might just got for it!
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