A start-up called Prose uses a quiz and AI algorithms to create each customer’s ideal product. The company has shipped 110,000 bottles and will reach $1 million in monthly sales on it first birthday next month. Photograph: Jeff Hinchee/The New York Times

When Renée Bibby has a good hair day, people stop her on the street and tell her they love her short curly hair. On a bad hair day, though, “I look li(...)