I want to grow my beard back after laser hair removal, advice?

Most patients need five or more laser hair removal treatments before they get good results.  You likely have white skin with black hair which typically gives the best results.  Many men that want thicker hair go on Propecia which is meant for the hair line but some people claim that it gives them a thicker beard.  Toppik (available from Amazon) and FUE (follicular unit extraction) can help make the hair look fuller but has some drawbacks.  If these things do not work you may want to have further laser treatments to treat the patches of hair.  Many of your hair follicles have been lost with your previous treatments so it might not be possible to regain its original thickness.

This may be difficult. Even with one or two treatments, some of the hair follicles that have been treated may have been adequately lasered to the point that they may not return. You can try Minoxidil and/or Larissa to try to promote hair growth in any remaining follicles. Although it takes several treatments to completely remove the hair in any given area, it is not always an equally distributed energy so some follicles may be more affected than others with each given treatment.