The present invention relates to structured triglyceride, to parental nutrition emulsions comprising same, and use thereof. In particular, the invention relates to structured triglycerides comprising at least one medium chain C.sub.6-C.sub.12 fatty acid and at least one fatty acid selected from the group consisting of long chain C.sub.14-C.sub.18 or very long chain C.sub.20-C.sub.22 fatty acids, preferably each fatty acid is present in a predetermined position of the glycerol backbone. The parenteral nutrition emulsions are particularly useful for nourishing preterm-and term-infants, children, critically ill patients, and cancer patients.