How I Built This with Guy Raz

EO Products: Susan Griffin-Black & Brad Black

In the early 1990s, Susan Griffin-Black was working for Esprit in San Francisco. On a business trip to London, she walked into a Covent Garden apothecary shop, picked up a bottle of lavender oil and took a whiff. The aroma — "like being in a beautiful garden" — literally changed her life. That was the inspiration to develop her own line of essential oil…