https://baldspot.org/blog/ Daily posts on minoxidil, tretinoin and hair regrowth. https://baldspot.org/blog/why-tretinoin-helps-minoxidil/ https://baldspot.org/blog/why-tretinoin-helps-minoxidil/ Wed, 04 Nov 2026 12:00:00 +0000 Dr. Lewenberg paired minoxidil with tretinoin in 1986. Forty years later, research on a scalp enzyme called sulfotransferase helps explain why it works for some people.