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    1. Melatonin Hormone that regulates sleep, sold as a supplement
    2. Hydrocortisone Mild corticosteroid used on the skin and scalp
    3. Finasteride Popular 5-alpha reductase inhibitor that lowers DHT, taken as a pill or used topically
    4. Biotin B vitamin, often sold as a hair supplement
    5. Sulforaphane Compound found in broccoli sprouts