Finasteride is effective for DHT/AR-driven hair loss but not for chromosome 20-driven cases, where treatments like minoxidil, prostaglandin analogs, and low-level laser therapy may be more beneficial. Genetic testing can help determine the underlying cause of hair loss to tailor treatment effectively.
Some hair loss may be linked to chromosome 20, which isn't affected by DHT blockers like finasteride. Treatments like minoxidil, microneedling, and genetic testing are suggested, but their effectiveness for this type of hair loss is uncertain.