Beard hair vs Scalp Hair

I have a question about using beard-to-scalp transplants for additional coverage/density in people who have advanced balding and are out of head donor hair. I know that for beard hair grafts, there’s usually only one follicle per graft whereas for scalp hair grafts there’s usually two or more follicles per graft. On the other hand, however, beard hair is much thicker than scalp hair. So does that mean that if you are using beard hair to provide density/volume, you would need twice as many beard hair grafts to provide the same density as you would get if you were using scalp grafts? Or does the beard hair thickness offset that?

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