Secoisolariciresinol diglucoside (SDG) is a lignan compound primarily found in flaxseeds, sesame seeds, and whole grains. It is a glycoside of secoisolariciresinol, which is known for its antioxidant properties. SDG is recognized for its potential health benefits, including anti-inflammatory, anti-cancer, and cardiovascular protective effects. It acts as a phytoestrogen, which may help in hormone regulation. In culinary applications, it contributes to the nutritional profile of foods, particularly in plant-based diets. Its sensory characteristics are not pronounced, as it is typically consumed in whole food sources.