It certainly can if you have a toxic situation going on. I know mercury poisoning is related to hairloss, and (oddly) when I began oil pulling I noticed my eyebrows have gotten much thicker on the outside corners. Do you have mercury fillings? Here is a brief blurb on hairloss and mercury poisoning. You can google for the full original article, this is from http://hairloss.about.com/b/a/140086.htm
If you're suffering from unexplained hair loss and have received a clean bill of health from your doctor, you may want to examine your fish eating habits. If you eat a lot of tuna, king mackerel, tilefish, swordfish and shark, you may want to have yourself tested for high levels of mercury.