Paul Michaux and fellow L'Oréal alum Arnaud Plas believed mass-manufacturing shampoo was not the answer to better hair, or a better environment. Prose hyper-customizes hair care by asking customers to take an AI-driven diagnostic test. The proprietary algorithm determines which ingredients their locks need most, be it lilac's fortifying powers or soy beans for extra volume. The startup has raised $7M in venture capital.

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