Described herein are emulsion compositions comprising fish oil and medium-chain triglycerides (MCT) and/or omega-3fatty acids and medium-chain triglycerides (MCT). In some embodiments, thecompositions further comprise, e.g., alpha-tocopherol,or one or more fatty acids. Further provided herein are methods of using thecompositions, e.g., to provide nutrion, e.g., parenteralnutrition to a subject and/or to treat or prevent certain conditions describedherein.