A liquid-based nutritional supplement containing enzyme-hydrolyzed concentrated protein derived from collagen, and fortified with L-tryptophan, with potential anti-cachexic and wound-healing activities. The concentrated, fortified, collagen protein hydrolysate liquid supplement contains all essential and non-essential amino acids. Upon oral administration, this supplement may improve both gastric functioning and gastrointestinal (GI) health, thereby reducing vomiting and diarrhea. The hydrolyzed protein helps to alleviate the digestive burden and allows for fast and efficient absorption and utilization of the protein. This may prevent both malnutrition and weight loss.