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.
Oral minoxidil and oral dutasteride are considered effective for hairline and hair recovery, but results vary. Topical minoxidil can still be used for beard and eyebrows even when taking oral versions.