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The correct choice is indeed scientifically supported for increasing hair growth. Finasteride is a medication that works by inhibiting the enzyme 5-alpha reductase, which converts testosterone into dihydrotestosterone (DHT). Elevated levels of DHT have been linked to androgenetic alopecia, a common form of hair loss in both men and women. By reducing DHT levels, finasteride can slow hair loss and promote regrowth in individuals suffering from this condition. This mechanism has been substantiated through various clinical studies, making finasteride a well-recognized treatment for enhancing hair density and growth in those experiencing hormone-related hair loss.

Other choices, while they may influence hair health positively or support hair growth in some contexts, do not have the same level of robust scientific evidence specifically for increasing hair growth as finasteride. Minoxidil is another recognized treatment for hair loss, particularly in the form of topical applications. Biotin and Vitamin E are often touted for their benefits in maintaining hair health, but their direct impact on increasing hair growth lacks the substantial clinical backing that finasteride has.