Dr. Joseph Salhab, known as Dr. GI Joe, recommends several snacks to maintain a healthy liver. His suggestions include lime with watermelon, sourdough with avocado, kimchi with sweet potato, and walnuts with almonds. He also suggests dark chocolate with berries, kiwi with Greek yogurt, and apples with cinnamon, all of which support liver health through antioxidants, healthy fats, and probiotics.