Ale (Madrid, Spain) on 12/05/2023:

I once read in a book on Cosmetic Acupuncture that enlarged pores are a sign of vitamin B5 (Panthotenic Acid) deficiency and that supplementing it for about 15 days should fix the issue.

I can confirm that this remedy works incredibly fast, at least on me, so I use it everytime I find that my pores are even slightly enlarged. I guess this is why some people commented that a vitamin B complex also worked for them. I just thought I'd share.