Thanks.

They take hair follicles from the back of your head, the "safe donor area" that is genetically immune to balding, and move them to the thinning areas. The total amount of hair on your head remains exactly the same, it's just repositioned to give the illusion of uniform coverage and eliminate bald spots.

That's also why it's not a miracle cure for baldness - you're limited by the amount of hair follicles available in the donor area.

See: https://ishrs.org/wp-content/uploads/2024/02/donor-area-asse...