New way to activate stem cells to make hair grow

rephrased version:

Breakthrough in Hair Regeneration: Unlocking the Potential of Stem Cells

Alternatively, you could also use a more descriptive and informative title such as:

Revolutionary Treatment for Hair Loss: Activating Stem Cells to Stimulate Growth

Or if you'd like to make it sound even more professional and clinic-focused:

Advancements in Regenerative Medicine: Harnessing the Power of Stem Cells to Promote Hair Growth

Let me know if you have any other requests!

Learn more about hair transplant at Rubenhair clinic.