Core concept
The donor area is not unlimited
Hair transplant surgery redistributes existing hair. It does not create new donor supply. The back and sides of the scalp may be more resistant to pattern loss, but the usable donor area still has limits that vary by patient.
- A patient with thick donor hair may tolerate more extraction than a patient with fine or sparse donor hair.
- Hair calibre, colour contrast, curl, and preferred haircut length affect how donor thinning appears.
- Future hair loss must be considered before spending donor grafts on a low or dense hairline.
- A clinic should explain what donor reserve remains after the first procedure.
