Okay, I asked this a few weeks ago with some saying that it is best to go as early as you can in the morning but someone on my last thread called Dee made a very good comment on the thread. She asked: "If your starting day is at 04:00, is a 09:00 cortisol test still accurate?"
This was the reason for my original question back along. Surely testing needs to be adapted to your natural rhythms?
My day starts late morning. Maybe one of the admins will clarify this.