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    1. Alopecia Areata autoimmune disorder causing patchy hair loss
    2. Peppermint herb and oil thought to stimulate skin and hair
    3. Procyanidin Plant polyphenol found in apples and grape seeds
    4. Melatonin Hormone that regulates sleep, sold as a supplement
    5. Follistatin Protein that blocks activin, a growth-regulating signal