Can over 6,000 Grafts Be Extracted from the Donor Region of African Americans or is It Much Lower?

6000 grafts can be harvested if you have the donor hair density.  As always, it depends on the exam.  If you have a high donor hair density, it is possible.  African Americans have slightly less donor density than Caucasian males.  6000 may be around the limit.  However, from personal experience we've done more.

This depends on the hair texture (tightness of curl), size of the donor area, the density of the donor hair, and the technique used. Follicular unit extraction (FUE), in the hands of an advanced practitioner, is able to harvest hair outside the traditional donor zone, thus widening the pool of prospective donor follicles. Additionally, if you are a candidate, FUE hair transplant using uGraft makes body hair a viable donor source, creating a yet greater pool from which to harvest. However, most African American patients must first undergo a trial procedure to determine whether their transection rate is acceptable for large-scale transplant.

Harvesting 6000 grafts is quite possible to in most people, regardless of ethnicity.  Of course, this would require two or more strip procedures as practically speaking, 3000 grafts alone is close to the upper limits (for most people).

Your scalp naturally would need to be evaluated in order to get an approximation of the number of donor hairs available for transplanting. 

Several instruments are available which may predict the density and ultimately the available donor hairs as well as ways to approximate the elasticity of your scalp, however, most experienced transplant surgeons will be able to tell you just by "eyeballing" your donor area.