Objective: To determine the effect of supplement containing hydrolyzed collagen and compared with the same composition has on wound healing in patients with TBSA 30-20 percent .soy flour can be used as a supplement in critical condition. ِdesine: Target population: 30 men under 70 years, 30-20TBSA burns, body mass index over 18, insensitivity to yogurt clinical trial is a double blind samples randomly divided into control and intervention.procedure: Korerry formula of 1,000 calories, total calories in the form of supplements was evaluated. 4 snack in the intervention group: supplement containing hydrolyzed collagen protein-based bovine, yogurt, sugar and control formulations are matched based on soy flour is heated, yogurt and sugar in 4 snack will be feeding.although supplements prepare by third person .Exclusion criteria: people with underlying conditions that prohibit the consumption of high-calorie, high-protein diet, such as diabetes, kidney and liver disease, addiction, respiratory disease and those with BMI less than 18% . During the study period of 60 days (30 days in hospital and 30-day follow-up). All calories and macro nutrients include carbohydrates, protein and fat are absolutely identical in both groups.Primary outcome measure: Before feeding, 15 and 30 of the fairy albumin ; weight and Arm circumference are recorded. Photo taken ulcer. . According to the effects of collagen hydrolyze in the formulation will be evaluated on wound healing.