Summary
Scientists discovered that hair grows by being pulled from surrounding cells, not pushed from the root. This new understanding could lead to better treatments for hair loss. The study used advanced imaging technology to observe the process.
Key Facts
- Scientists from L'Oréal and Queen Mary University of London conducted the study.
- They used 3D live imaging to watch hair follicles in a lab.
- Traditional biology believed hair was pushed out from the root as it grew.
- The new finding shows hair is pulled up by coordinated cell movements.
- Blocking cell division did not stop hair growth, challenging old beliefs.
- Blocking a protein called actin, which helps cells move, slowed growth by over 80%.
- Computer models supported the new "pulling" theory of hair growth.
- Future hair loss treatments might focus on this pulling mechanism.
