Encapsulation of conjugated linoleic acid and ruminant trans fatty acids to study the prevention of metabolic syndrome—a review.

This article reviews the encapsulation of conjugated linoleic acid (CLA) and ruminant trans fatty acids (R-TFAs) as strategies to improve their stability, bioavailability, and potential effects on metabolic syndrome (MetS) risk factors. Encapsulation methods, primarily microencapsulation using carbohydrates and proteins via oil-in-water emulsification and spray-drying, protect CLA from oxidation, mask unpleasant tastes, and enable controlled release in the gastrointestinal tract. Limited studies comparing encapsulated versus non-encapsulated CLA suggest enhanced bioavailability and greater reductions in body fat, triglycerides, and cholesterol with encapsulated forms, though evidence remains preliminary. Research on encapsulated R-TFAs is scarce, and further well-designed in vitro, animal, and human studies are needed to clarify the comparative benefits of micro- and nano-encapsulation for both CLA and R-TFAs in mitigating MetS risk factors.