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      Effects of chronic intake of vegetable protein added to animal or fish protein on renal hemodynamics.

      Nephron. Physiology
      Adult, Cross-Over Studies, Dietary Proteins, administration & dosage, Female, Glomerular Filtration Rate, Hemodynamics, physiology, Humans, Kidney, Male, Meat, Renal Plasma Flow, Urine, chemistry, Vegetable Proteins

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          To examine whether chronic intake of vegetable protein added to animal protein diet affects renal hemodynamics or not, we studied effects of three kinds of diets containing various amounts of animal and vegetable protein with 1-week dietary program in each on renal hemodynamics. The crossover design of different amounts of vegetable protein added to the constant amount of animal protein was applied to two groups of 7 healthy individuals after the control dietary program. Renal function and 24 hours' urinary albumin excretion rate (AER) were examined on every 7th day of three consecutive 1-week dietary programs. Glomerular filtration rate (GFR; sodium thiosulphate clearance) and renal plasma flow (RPF) significantly decreased after decreasing the intake of animal protein by one third with keeping the amount of vegetable protein constant. The results when substituting vegetable protein for some of the animal protein in the diet without changing the total amount of protein were identical. The filtration fraction and AER did not change over the study periods regardless of dietary composition. The lack of an effect a 1-week intake of vegetable protein added to animal protein on GFR and RPF suggests that vegetable protein may be excluded from lists of restriction in low protein diet therapy in patients with renal insufficiency. Copyright 2002 S. Karger AG, Basel

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