My point about jet lag is that the impact may be non-linear. Thus my question. I don't think that helps. I was expecting a responce like this. Not all of us have the time or ability to monitor ourselves properly.
Life is too short.
We all have a similar problem. My name is Glenn. You simply cannot generalise from one person's experience. After all, many people who smoke do not get lung cancer. I like having a cup of coffee in the morning.