Matiresinol is a natural substance found in certain plant-based foods. One of such foods is flaxseeds.
In the human body, matiresinol converts into enterodiol, which then converts into enterolactone. These substances have antioxidant properties and help improve metabolism.
Flaxseeds, containing matiresinol, are also rich in beneficial fats, including Omega-3 fatty acids, which are important on a keto diet.