IGF-1 has different ranges depending on age. If it's high that's generally a good thing. It may be due to eating a high protein diet, if there's anything to the recent study that linked protein consumption to cancer. I think that study seemed pretty bogus, but perhaps the part about protein raising IGF-1 is true. If the study is true, then people using HGH or peptides would be putting themselves at greater cancer risk.
Mine has been high too the times I've tested it. I'm 50 and it's in range of a 35 year old and I'm not going to complain or worry at this point.