30 citations
,
November 2005 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings”
The lipid in human hair follicles acts as a barrier, similar to the skin's lipid layer.
25 citations
,
March 2017 in “Experimental Dermatology”
The document concludes that understanding hair follicles requires more research using computational methods and an integrative approach, considering the current limitations in hair treatment products.
Dutasteride has a larger volume of distribution than finasteride due to its lipophilic nature, allowing it to concentrate in hydrophobic areas and making it difficult to excrete. A user experiencing hair loss has been using oral finasteride for 10 months with minimal regrowth and is considering switching to dutasteride or adding oral minoxidil.
Many users report better results with finasteride than dutasteride for hair loss, despite studies suggesting otherwise. Some suggest that dutasteride's effectiveness may depend on the delivery method, such as using lipids for absorption.
Topical finasteride concentrations are likely much higher than necessary for effective follicular DHT suppression, with current standards being 100-1000 times above the theoretical minimum. Lower concentrations (0.001-0.0025%) might still work locally while minimizing systemic exposure.
Scalp biopsies are crucial for diagnosing hair loss conditions like Diffuse Unpatterned Alopecia (DUPA) and retrograde hair loss, as treatments like finasteride and dutasteride may not be effective if other conditions are present. Combining PPAR-GAMMA agonists with retinoids could improve treatments for conditions like Lichen Planopilaris.