: In people with normal kidney function, a high-protein intake isn’t usually a problem. But a high-protein diet does increase renal blood flow, which would increase the GFR. If the kidneys are already working overtime to handle the increased demands placed on them by body size, a high-protein diet may exacerbate this. Likewise, in patients who have documented renal disease, a lower protein intake does remove some stress from the kidneys. Within normal ranges, protein intake is unlikely to be a major player, but for someone who weighs 300 pounds and whose kidneys are already working pretty hard, eating 550 grams of protein a day is just another added stress.
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