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    1. Melatonin Hormone that regulates sleep, sold as a supplement
    2. Valproic acid Anti-seizure and mood-stabilising drug
    3. Tretinoin Vitamin A retinoid cream, prescribed for acne
    4. Neem Oil Oil from the neem tree, used in traditional remedies
    5. Procyanidin Plant polyphenol found in apples and grape seeds