I got rid of my Inhaler and I saw myself getting a little bit younger, after years of rapid aging (stress, anxiety, depression, etc.) and now I’m experimenting with Grey hair field (2.5 one), because I saw some white hair, especially on my beard… 
My father had Amazing genes for hair, he barely started getting his first white hairs in his 60s, while my mom got her in her 20s…
Anyway, I won’t let myself get too much white hair, enough is enough lol.
Also, regarding the Inhaler: