The Journal
Science-backed hair care, texture intelligence, and the future of inclusive beauty — written for every type.
Hair Science
Hair typing is more than a letter and number. Learn the science behind the classification system, why porosity matters just as much as curl pattern, and how to identify your unique hair profile for better care decisions.
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Technology
Most beauty AI was trained on limited textures. Here's why that's a problem and how Tressana is building differently.
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Ingredients
Not all "natural" products are safe for coily and kinky textures. We break down the ingredients that silently damage Type 3 and 4 hair.
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