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Story summary
- L'Oréal and Queen Mary University of London researchers report that human hair grows by being pulled upward from within the follicle, not pushed from the root.
- Using advanced 3D live imaging, researchers observed outer root sheath cells moving in a spiral that generates the pulling force.
- The study links mechanical and biochemical factors in hair growth, pointing to new treatments for hair disorders and regenerative medicine, published in Nature Communications.
