I can't tell either
But ten years ago, working crazy hours and with other stresses in my life, I had a grey tinge to my skin and looked a lot older than I do now. However mad it may seem, it was true. I also didn't take anything to help with sleep.
Now I sleep better, thanks to meds, and work less, I look younger and don't have the grey tinge. The difference is huge.
I managed to be fat and have a haggard face back then! I also lost hair on account of stress, mostly from the crown of my head. It grew back.