Yes, liver is keto-friendly. It contains very few carbs, is high in proteins, and has lots of vitamins and minerals.  Liver contains just 3.8g of net carbs and a whopping 26g of protein, making it incredibly nutritious, low carb, and keto-friendly. This beef liver recipe does include onions, which are higher in carbohydrates. You can either make the recipe without the onions or have a few to fit your macros.