Why Is Testosterone Highest in the Morning?

Is it better to take finasteride Propecia in the morning? I have read mixed answers, but what time approximately in the morning should I take the pill? Is testosterone levels highest in the morning because we sleep? In case I take the pill in the morning and go to sleep afterwards will it be less effective or will testosterone increase even more?

I hope you can help, I’m quite worried..

It probably does not matter when you take the Propecia (finasteride 1mg) each day, but I can rationalize and then suggest a morning dose will hit the testosterone and DHT when blood levels are highest. I don’t know why we produce more testosterone in the morning.