Combining tretinoin with minoxidil may enhance hair growth when minoxidil alone becomes less effective. Apply tretinoin, wait 40 minutes, then apply minoxidil, and avoid sun exposure.
Tretinoin may enhance minoxidil absorption, potentially improving hair regrowth when combined with microneedling. Users discuss various treatments like minoxidil, finasteride, dutasteride, and microneedling, with mixed results and concerns about side effects and scarring.
Tretinoin can cause non-telogen hair loss in some men by inducing catagen-like changes in hair follicles and through retinoid toxicity, especially when used with minoxidil. Some users report hair loss even when using retinoids on the face, while others experience benefits when combined with treatments like finasteride and minoxidil.
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.