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    1. Melatonin Hormone that regulates sleep, sold as a supplement
    2. Thymosin Beta 4
    3. Ketoconazole Antifungal, best known as a dandruff shampoo
    4. Alfatradiol Weak form of estrogen applied to the scalp
    5. Fluridil Topical anti-androgen sold as a cosmetic lotion