Butter is extremely healthy. It's a perfect ketogenic diet food because it's carbohydrate-free and doesn't raise blood sugar. It's nutritionally dense and adds flavor to other foods.Butter is loaded with vitamins E, D, A, B12, and K2. It also has healthy fats, 25% of the fat in butter is monounsaturated. Additionally, butter contains conjugated linoleic acid (CLA) and Butyrate.