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    1. Melatonin Hormone that regulates sleep, sold as a supplement
    2. Valproic acid Anti-seizure and mood-stabilising drug
    3. Azelaic Acid Acid used in acne and rosacea creams
    4. Follistatin Protein that blocks activin, a growth-regulating signal
    5. Dexpanthenol Provitamin B5, a moisturiser in hair and skin products