Peter Attia· MD
follicular unit extraction is the use of a very very tiny punch let's call it about a millimeter in the early days we use disposable punches or sharp that were used for punch biopsies but these were very very small items smaller than the tip of a ballpoint pen typically to harvest the individual follicular unit so those are the groups of one two or three hairs each out of the scalp so the graft comes out of the scalp basically ready and without a scalpel and without stitches