A method of preparing rumen-protected polyunsaturated fatty acids (RuPUFAs) for use in ruminant feeds by inducing the Maillard reaction between a reducing carbohydrate source and de-oiled lecithin in the presence of a PUFA under reduced pressure conditions is disclosed. Products made by the process, as well as methods for enhancing performance, assisting the induction of pregnancy, alleviating inflammation, modulating fetus growth, improving immune system function, and modulation of the fatty acid composition of meat and milk of ruminant animals are also disclosed.
