title: Relationship between protein intake and nitrogen balance in obese patients on low energy diet.
abstract: The effect of nitrogen intake on nitrogen balance was studied in six obese patients receiving low energy diets. They were given a control diet containing 2,000 kcal of energy and 80 g of protein for the first ten days. Then they were given Diet A with 1,100 kcal of energy and 70 g of protein for the next 2 weeks, followed by Diet B with 1,100 kcal of energy and 50 g of protein for 2 weeks. The relationship between nitrogen intake (X, mg/kg) and nitrogen balance (Y, mg/kg) during the low energy diet periods was statistically significant, with Y = 0.388X-60.32 (SD = 17.71, r = +0.67, n = 11, p less than 0.05). The nitrogen and protein requirements were estimated from this equation to be 201.1 mg/kg and 1.26 g/kg, respectively. In our experiment, the nitrogen balance in obese patients was well maintained although total energy was reduced to 1,100 kcal/day in Diet A. It is suggested that protein quantity in the diets should be taken into account when a low energy diet is used for the treatment of obesity.
authors: Department of Food and Nutrition, Faculty of the Science of Living, Osaka City University, Japan.
authors: Y
authors: Y
authors: Oi
authors: T
authors: T
authors: Okuda
authors: H
authors: H
authors: Koishi
authors: H
authors: H
authors: Koh
authors: M
authors: M
authors: Waki
authors: M
authors: M
authors: Kurata
authors: S
authors: S
authors: Nambu
mesh_terms: D001798:Blood Proteins / Q000032:analysis; D001806:Blood Urea Nitrogen; D001835:Body Weight; D002784:Cholesterol / Q000097:blood; D003404:Creatinine / Q000097:blood; D004038:Diet, Reducing; D004044:Dietary Proteins / Q000008:administration & dosage*; D004734:Energy Metabolism; D005243:Feces / Q000032:analysis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009584:Nitrogen / Q000378:metabolism* / Q000652:urine; D009752:Nutritional Status; D009765:Obesity / Q000178:diet therapy*; D014280:Triglycerides / Q000097:blood
chemical_list: D001798:Blood Proteins; D004044:Dietary Proteins; D014280:Triglycerides; D002784:Cholesterol; D003404:Creatinine; D009584:Nitrogen