If you have problems with your liver or your kidneys, for example if you have been diagnosed with chronic kidney disease you may be told to lower your protein intake. When your body processes food, the wast product urea is formed. If you have problems with your kidneys the urea may not be passed as it should. A build-up of such waste products can be very damaging for your health.  By lowering the amount of protein you consume you are decreasing your kidneys' workload. But remember that protein is an essential part of your diet and you should only switch to a low protein diet when advised and under the supervision of a doctor. The first step to eating less protein is getting a clear understanding of where and how you consume protein in the first place. We consume two types of protein, high-value protein and low-value protein. Animal protein is high-value protein. It's important that you consume enough of this in order to keep your body healthy. This type of protein typically produces less waste than low-value protein due to the balance of amino acids.  Chicken, turkey, fish, red meat, eggs, and pork are high-value protein foods. Dairy is also a high-value protein, but dairy products also contain a high amount of phosphorous. Because of this, you may be required to lower the amount of dairy products you consume. Vegetable and plant proteins are known as low-value protein because they have less of the essential amino acids that high-value proteins contain. Examples of this kind of protein include cereals, bread, nuts, pasta, rice, noodles and dried beans.  Sometimes high-value proteins, rich in amino acids, are known as complete proteins and low-value proteins as incomplete proteins.  Always check the labels on food packaging to learn about the protein content. Once you know the main sources of protein and their respective values you can begin to analyse your diet and discover where and how you consume protein. If you have a problem with your liver or kidney that has required you to lower your protein, you...

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Write a summary of the previous text in Vietnamese:
Hiểu vì sao có thể bạn cần ăn ít protein hơn. Xác định thực phẩm có thành phần protein giá trị cao. Nhận diện thực phẩm có thành phần protein giá trị thấp. Đánh giá chế độ ăn hàng ngày của bạn. Biết lượng nạp vào khuyên dùng.