A. Oats are a nutritious food, despite this. Oatmeal has a higher lectin content than other foods and typically contains gluten and a few antinutrients. Oatmeal also contains a lot of starch and carbohydrates, which can cause an increase in blood sugar and weight gain. As a result, it can't be a healthy option for a ketogenic, carb-free, or lectin-free diet.