Dr. Patrick's daily smoothie — 3 cups kale, 2.5 cups frozen blueberries, half an avocado, protein powder, and beta-glucan fiber — is engineered for maximum nutrient delivery. No banana: it contains polyphenol oxidase, which destroys the blueberries' polyphenols. Avocado replaces it, adding creaminess while quadrupling lutein and zeaxanthin absorption from the kale.