Abstract: The present invention relates to oil compositions that are enriched in polyunsaturated fatty acids; compositions containing the oil compositions; and methods of making and using the oil compositions. The oil is preferably a microbial or marine oil.

Abstract: The disclosed subject matter, in one aspect, relates to compounds and compositions {e.g., polysaccharides and polysaccharide complexes) and methods for providing and using such compounds and compositions. Disclosed are compositions comprising a polysaccharide or polysaccharide complex obtained from Chlorella, wherein the polysaccharide or polysaccharide complex has a molecular weight of from about 1×103 to about 1×106 Da. Also disclosed are methods of providing a polysaccharide or polysaccharide complex, comprising the steps of providing a Chlorella extract, contacting the extract with a solvent to provide a precipitate, contacting the precipitate with additional substances {e.g., a surfactant) and isolating an insoluble fraction, and size fractioning the insoluble fraction, thereby providing the polysaccharide or polysaccharide complex. Disclosed are also methods for using the disclosed polysaccharide and polysaccharide compositions.