A. Lectin levels are high in casein, one of the proteins found in cow's milk. Particularly casein A1, a subtype of casein. You still have to eat casein even if you buy organic. It affects the digestive system, is high in lectins, and negatively affects gluten-intolerant persons. You can opt for almond milk over regular milk, which is more nutritious, low in calories, and rich in vitamins and minerals. It may also help to reduce heart disease and help to strengthen bones.