When to start insulin?

I'm doing HGH at low dose (3 IUs now, will work up to 4 IUs within a month, then level off there) for lean muscle and increased exercise tolerance for distance running (not to mention that I'm 47 and just need it). Also doing 200 mg of CYP weekly.

My question is regarding insulin. Do I need to even consider it at this low of a dose of HGH? I would rather not have to deal with it all.

dont worry about it if you dont want to use it. at your age you should see some decent results off 4ius and of course slin will help but its not a neccesity