High triglyceride levels can be effectively controlled through a multifaceted approach, which includes, exercise, diet and medication. Exercise to attain and sustain a healthy weight and fitness level. Incorporate healthy changes into your diet to lower your risk of heart attack or stroke. Replace unhealthy, highly-processed carbohydrates with healthy carbohydrates such as beans, nuts, whole grains, low-fat dairy, fresh vegetables and fruits. Increase intake of high-fiber foods. Substitute saturated fats and trans-fatty acids with monounsaturated fats and omega-3 rich foods. Decrease caloric intake by 20 to 30 percent and eat foods with a low glycemic index value. Include healthy, lean proteins and fish to your meal plan.