Microneedling at depths greater than 0.6 mm may damage miniaturized hair follicles, with 0.5 mm showing better results for hair regrowth. Combining microneedling with minoxidil enhances absorption, but caution is advised to avoid damaging follicles.
Using tretinoin with minoxidil may improve absorption but results vary; some users see improved follicle growth while others notice no significant difference. Applying tretinoin before minoxidil is suggested by some users.
Dutasteride reduces DHT more effectively in hair follicles than finasteride, but some individuals still experience hair loss despite treatment. Combining oral and topical finasteride may improve results, and some users experiment with topical dutasteride despite uncertainties about its absorption.
Tretinoin may worsen hair loss by inducing premature hair follicle regression. It can be used with minoxidil to increase absorption but should not be used alone.
Switching from propylene glycol to glycerin in topical finasteride may reduce systemic absorption and side effects while maintaining local scalp DHT suppression. Concerns exist about glycerin's ability to deliver the full dose to hair follicles.