No grey hair yet but I have wrinkles under the eyes.
Moisturizers and Aloe do the trick but we all know wrinkle cremes are all a high price fraud. If one wants to avoid sure fire Retinol or risky plastic surgery I figured that what would be a temporary fix should shrink and constrict tissues.
So I ground up some alum/styptic pencil and added some aloe gold bond moisturizer creme and vitamin A&E. It works for several hours. I bet this is the principle behind Plexiderm as seen on TV.

Hooded eye brows might be the next project.
Getting alum in the eyes is unpleasant or perhaps dangerous.
Homeopathic concentrations may be good for Fuchs syndrome but that is for another day.

As for vanity even a haircut is vain.
As for temporary, so is aspirin.