For hair metal test, you need to apply Andy Culter counting rule to read the report. I am afraid most of the hk practitioners or the so called experts do not have such knowledge and they may just simply comment without thinking you have a metal problem if the marker is high and no problem if the marker is low. I think a person who knows English can come up with the same interpretation as the so called "expert".
You can search for the details of counting rules. Sorry that my office network has blocked the access of so many sites. I will try to post the details in these few days using my home computer.