However, doubling dietary protein intake (1.8 g · kg − 1 · d − 1) abrogated the increased nitrogen excretion and resultant negative nitrogen balance that occurred after the 7 - d energy deficit. (academic.oup.com)
For example, «Cumulative urinary nitrogen excretion was significantly greater and cumulative nitrogen balance significantly more negative, during treatment with the ketogenic than with the nonketogenic diet... Whole - body rates of leucine oxidation were significantly higher during treatment with the ketogenic than with the nonketogenic diet...» (Vazquez and Saimak, 1992). (caloriesproper.com)
«Athletes on high protein diets should stay well - hydrated, as water loss can be increased from nitrogen excretion during protein breakdown.» (mensjournal.com)