During a keratin hair treatment, stylists apply a keratin-based product to the hair before using a flat iron to seal it in. This process can smooth frizzy or damaged hair, producing a sleek, shiny ...
Fin vs Fin on MSN
Collagen vs. Biotin vs. Keratin: Understanding the Differences for Hair Loss and Regrowth
Collagen supports hair structure and scalp health, while keratin repairs hair strands and enhances hair smoothness and shine.
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