Keratin shampoos are widely promoted as a solution for frizz, roughness, and damaged hair. Many people turn to them hoping for smooth, shiny, salon-like results. However, a common concern remains: does keratin shampoo truly make hair smooth, or does it leave hair flat and lifeless? The answer depends on hair type, scalp condition, and how the shampoo is used. Haircare philosophies followed by...
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