Lose weight if you are overweight.
Since your body releases triglycerides into the bloodstream from your stored fat, the less fat you have available, the lower your triglycerides will be. You don't have to lose a lot of weight to see a benefit either. Losing just 7-10% of your body weight (just 14-20 pounds for a 200-pound person) can make a difference in your triglycerides—and for your heart!
Control your calories.
Consuming more calories than your body needs results in the extra calories being stored as fat (triglycerides) in the body. By eating what you need—not more—you'll help manage your weight and lower your triglycerides, too.
Avoid sugar and fast-digesting carbohydrates.
Simple carbohydrates (like white flour) and sugars in any form (sugar, corn syrup, natural sweeteners, honey, etc.) are more likely to be stored as fat (triglycerides), especially if eaten in excess. Limit your intake of added sugars and make sure that you're not overeating carbs, which should make up no more than 60% of your total calories each day. When making carbohydrate choices, choose fiber-rich, unprocessed foods as much as possible, such as whole grains, fruits, vegetables and beans. These are slower-digesting and less likely to be stored as fat when compared to other carbohydrate sources.
Follow a heart-healthy diet.
Limit your daily cholesterol intake to no more than 200 milligrams and keep your saturated fat intake to less than 7% of your daily calories. Choose foods rich in heart-healthy fats, such as nuts, olive oil, seafood and avocadoes while limiting your intake of trans fats (hydrogenated oils). If you do drink alcohol, you may need to cut back. Small amounts of alcohol (which is high in calories and sugar and is often stored as fat) have been shown to elevate triglyceride levels, so cut back on drinking.
The American Heart Association recommends at least 30 minutes of physical activity on most of all days of the week. Exercise boosts your HDL (good) cholesterol levels and lowers your LDL (bad) cholesterol levels and your triglycerides. Plus, it helps you to burn extra calories and lose weight—both of which can reduce triglycerides in their own right.