I am 40 years old but my face looks old and haggard.

I am 40 years old but my face looks old and haggard. Is there any non-invasive technique that I can do to improve my skin?

If you want to know how to look younger you should read up on it on the internet. You could also try out Kaya's Facelift with Threads treatment. It is a non-invasive technique that builds supportive structure to restore facial contour from within. You will surely look much younger than your age.