You know a smoothie is something special when a chef who has cooked for everyone from Karlie Kloss to Owen Wilson drinks it every day. “It has everything I love: citrus, berries, vegetables, spices, and even seaweed, all blended into a beautiful emerald green,” chef and author Mikaela Reuben says.

The smoothie is the product of years of trial and error—a lifetime, in fact. Reuben began experimenting with food when she was a little girl exploring the herb garden in her family’s backyard. “I realized how even the smallest ingredient could transform a meal,” she recalls.

Eventually, her fascination with nutrition became her love language and a 15-year career—one that she’s been sharing with celebrities that also include Ryan Reynolds, Blake Lively, Hugh Jackman, and Brie Larson , ju

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