Witch hazel
Witch hazel is the classic 'tightens your pores' toner. In reality, the studies behind it are mostly done on cells in a lab, not on actual people, and even those couldn't credit the astringent part everyone talks about. Many bottles also blend it with alcohol, which dries and irritates skin exactly the way the AAD warns against. It's a step you can drop and lose nothing.
what the evidence says
Human clinical evidence is scarce (mostly in-vitro); AAD advises against alcohol-based astringents for acne-prone skin, and many witch hazel products are alcohol-based.
stage a kind intervention
Got a friend who swears by this? Send them the receipts. The message is pre-written to be kind, because the product is the problem, not your friend.
“Saw this and thought of you. No judgment, just receipts on witch hazel: https://skinformed-gamma.vercel.app/ingredient/witch-hazel/”
sources
note:Skinformed is general education, not medical advice. It doesn't know your skin, can't diagnose anything, and is no substitute for a clinician. If something on your skin hurts, spreads, or worries you, that's a doctor visit, not a product search.