Tretinoin and microneedling both enhance hair growth through different mechanisms, with microneedling being considered safe for long-term use. Optimal microneedling needle length varies, but 0.8 mm is suggested for hair growth, and a Dermastamp is recommended to avoid skin damage.
Tretinoin may enhance the effectiveness of minoxidil for hair regrowth by increasing enzyme activity and skin permeability, but its standalone impact is limited. Some users experienced improved hair growth with tretinoin, while others found it worsened their condition.
The conversation discusses the difficulty of applying tretinoin 0.025% cream on the scalp and considers switching to a gel for easier application. It also mentions that a liquid solution, ideally combined with minoxidil, may be more effective for hair treatment.
Tretinoin can enhance minoxidil effectiveness by boosting the sulfotransferase enzyme. Users suggest sources for affordable tretinoin and mention a product combining tretinoin with minoxidil.