Nuts are a great option for your health and some nuts are loaded with healthy fats that can protect your body from a number of conditions. Walnuts are a tasty option from the nut group that can help protect your body from a variety of conditions, including your liver. One of the primary compounds in walnuts is a protein known as arginine, which can help to filter ammonia from your liver. The protein takes ammonia molecules from your liver and converts it to urea and then urine. This is a rather simple process for the protein and the liver, but without the protein, this process is much slower to occur.