In response to a protein-restricted diet for acute kidney injury, which statement best reflects the dietary rationale?

• A. A high-protein intake ensures an adequate daily supply of amino acids to compensate for losses.
• B. Essential and nonessential amino acids are necessary in the diet to supply materials for tissue protein synthesis.
• C. This diet supplies only essential amino acids, reducing the amount of metabolic waste products, thus decreasing stress on the kidneys.
• D. Currently, your body is unable to synthesize amino acids, so the nitrogen for amino acid synthesis must come from the dietary protein.

Answer: (C)

In acute kidney injury, the dietary aim is to limit the kidneys’ workload by reducing the production of nitrogenous waste from protein breakdown. Providing only essential amino acids gives the body the building blocks it needs for tissue repair while avoiding extra nitrogen that comes with nonessential amino acids, which would increase urea and other waste substances the kidneys must handle. The body can synthesize nonessential amino acids, so they don’t have to come from the diet, allowing a restricted plan to meet essential needs without adding unnecessary metabolic waste. Essential amino acids must come from what you eat, but supplying them directly supports healing without elevating waste production. This approach minimizes metabolic burden on the kidneys while still supporting recovery. The other statements either advocate too much protein, assume all amino acids must be dietary, or claim the body cannot synthesize amino acids, which isn’t accurate.