My son had 8 laser tx. on his face/scalp for a segmental hemangioma. He is only 5 (almost 6) so I am not sure about his beard...but his hair has filled in nicely on his scalp where the h. at one point dominated (very little hair growth and what he had was odd texture). His final laser tx. 1/2 his head was shaved to trace the vessels... his hair grew back and thickened to match the rest of his hair.
I would email Dr. Nelson from the ask the expert list.... he explained to me aboout light color and what it destroys. I'd go into more detail, but don't want to mis-state what he said. Do email him.
VBF Director of Family Services
vbfadvocate @ live. com (no spaces)