Higher triglyceride levels correlate with increased risk of heart disease, states WebMD. This risk may further increase in people with high levels of bad cholesterol and low levels of good cholesterol. High triglyceride levels range between 200 and 499 milliliters per deciliter, while very high levels are 500 or above.
People with Type 2 diabetes and high triglyceride levels may also have increased risk of developing heart disease, according to WebMD. Healthy diet and regular exercise can lower triglyceride levels and improve cholesterol. Other methods of lowering triglyceride levels include losing between 5 to 10 percent of body weight, consuming less carbohydrates, eating fish high in omega-3 oils, and reducing alcohol intake.