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Amazon.com : Alpecin C1 Caffeine Shampoo, 8.45 fl oz, Caffeine Shampoo Cleanses the Scalp to Promote Natural Hair Growth, Leaves Hair Feeling Thicker and Stronger : Beauty & Personal Care
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Scientific Review: Caffeine shampoo does NOT stop hair loss. False claims and "fake" research. 19 References included. : r/tressless
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