Clinical trial study was make, data were obtained from people awaiting liver transplantation and with at least a criteria of protein/energy malnutrition (fase angle \< 5.4°, subjective global assessment B or C and/or handgrip strength \< 30 in men and \< 20 in women). The investigators make them body composition assessment (weight, height, body mass index \[BMI\], mean arm circumference \[MAC\], muscle arm area \[MAA\], tricipital skinfold, Dual X ray absorptiometry \[fat mass and fat free mass\]) and handgrip strength at beginning and after 30 days of nocturne supplementation with BCAA and standardized diet (35-40 Kcal, 55% carbohydrates, 25% lipids and 20% proteins).