The present disclosure provides methods for improving accumulation of one or more polyunsaturated fatty acids in an animal through the use of a boosted feed composition comprising polyunsaturated fatty acids and a bacterial biomass (e.g., methylotrophic, methanotrophic, or both), wherein the animal that is fed and consumes the boosted feed composition accumulates the one or more polyunsaturated fatty acids more efficiently than when fed a reference feed composition lacking the bacterial biomass.