Soy milk is often credited with improving heart health by managing cholesterol levels and triglycerides, and significantly lowers your risk of developing a cardiovascular disease. You can even find soy milk fortified with Calcium, Vitamin A, and Vitamin D, which gives you all the benefits of cow milk, without the side-effects of high-fat content and lactose. Unlike cow milk, soy milk only contains proteins from vegetables, which stops calcium loss, whereas dairy proteins may be linked to the osteoporosis. Each cup of soy milk contains around 20 mg of isoflavones. Isoflavones help reduce cholesterol, prevent osteoporosis, and may reduce your risk of developing certain types of cancers such as prostate cancer or breast cancer. Isoflavones are antioxidants that help protect our cells; regular cow’s milk does not contain any isoflavones.