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    1. Neem Oil Oil from the neem tree, used in traditional remedies
    2. Melatonin Hormone that regulates sleep, sold as a supplement
    3. Vitamin D Vitamin made in the skin from sunlight, also taken as a supplement
    4. Procyanidin Plant polyphenol found in apples and grape seeds
    5. Estradiol Estrogen hormone, prescribed in tablet, patch and gel forms