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    1. Melatonin Hormone that regulates sleep, sold as a supplement
    2. Azelaic Acid Acid used in acne and rosacea creams
    3. Sulforaphane Compound found in broccoli sprouts
    4. Neem Oil Oil from the neem tree, used in traditional remedies
    5. GHK-Cu Copper peptide used in skin and hair cosmetics