The imbalance between oxidants and antioxidants in the human body can cause oxidative stress which could cause cell damages. Malondialdehyde (MDA) is one of the products of lipid peroxidation, often used as an indicator to detect the oxidative stress damage in the body. Oxidative stress can be prevented by antioxidants. Soybean and tempeh have high antioxidants content, e.g. isoflavone, vi…