Some people are able to maintain with nothing. Most people aren't genetically predisposed to go full NW7. Minoxidil increases Wnt signalling too. That alone isn't enough to reverse baldness or to even maintain for long in the face of continuing destruction from DHT. It's like replacing one link on a chain, it strengthens it temporarily, but the other links continue to rust until it breaks. Is far as I could find SM simply inhibits GSK3b, but does nothing about the rest of the Axin destruction complex, shh, noggin, etc.