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“Actives” in shampoo bars a waste?
A lot of experienced members claim there is no point to adding good ingredients to shampoo bars since it washes away but I have had very good experiences with my shampoo bar where I added keratin, aloe, panthenol, oats, etc. My hair feels so much nicer. But I don’t want to waste money. What is the real science behind this? I would love to add niacinamide to my shampoo bar.
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