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Derma rolling is one of the most evidence-backed at-home tools for hair regrowth. Learn how to use a 0.5mm derma roller, the science behind microneedling, and how to pair it with serums for maximum results.
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Thinning hair? Discover the science behind Biotin and Caffeine serums — how they work, who they're for, and how to build a complete hair care routine around them. Includes expert tips and internal links to our full hair care guide.
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