Triglycerides are a type of fat circulating in your blood that your body uses as its primary energy reserve. When you get a lipid panel (the standard cholesterol blood test), triglycerides are one of the key numbers reported alongside LDL cholesterol, HDL cholesterol, and total cholesterol. A normal triglyceride level for adults is below 150 mg/dL.
What Triglycerides Actually Do
Every time you eat more calories than your body needs right away, it converts the excess into triglycerides. These fat molecules, made of three fatty acids attached to a glycerol backbone, get stored in fat tissue and muscle for later use. Between meals or during physical activity, your body breaks them back down and burns them for fuel. This storage-and-release cycle is essential. Triglycerides are the main way both plants and animals store energy.
Your liver packages triglycerides into particles called VLDL (very-low-density lipoprotein) and releases them into your bloodstream to shuttle fat to tissues that need it. The amount of triglycerides flowing through your blood at any given time depends heavily on what you’ve recently eaten, which is why your doctor may ask you to fast before the test.
How Triglycerides Differ From Cholesterol
Triglycerides and cholesterol both show up on the same blood test, but they serve completely different purposes. Triglycerides are fuel. Cholesterol is a structural material your body uses to build cell membranes and make hormones. The problems they cause when elevated are related but distinct: excess LDL cholesterol builds up directly on blood vessel walls as plaque, while high triglycerides contribute to heart disease through a more indirect route involving leftover particles that trigger inflammation and plaque formation. HDL cholesterol, often called “good” cholesterol, works in the opposite direction by carrying cholesterol back to the liver for disposal.
What Your Numbers Mean
For adults, triglyceride results fall into these categories:
- Normal: below 150 mg/dL
- Mild (borderline high): 150 to 199 mg/dL
- Moderate (high): 200 to 499 mg/dL
- Severe (very high): 500 mg/dL or above
For young people between ages 10 and 19, the threshold for normal is lower: below 90 mg/dL.
Your provider will typically ask you to fast for 9 to 12 hours before the blood draw, since eating (especially a fatty meal) can temporarily spike triglyceride levels and skew the results. Water is usually fine during the fasting window.
Why High Triglycerides Matter
Elevated triglycerides raise your risk of cardiovascular disease. The mechanism works like this: when triglyceride-rich particles in your blood get partially broken down, they leave behind cholesterol-packed remnants. These remnants penetrate artery walls and promote plaque buildup in a process similar to what LDL cholesterol does. They also trigger inflammatory responses in blood vessel cells, increasing the production of molecules that attract immune cells and damage the vessel lining.
At very high levels, the risk shifts from long-term heart disease to a more immediate threat: acute pancreatitis, a painful and potentially dangerous inflammation of the pancreas. This complication is unlikely below 1,000 mg/dL, but the risk climbs to about 10% once levels exceed 1,000 mg/dL. Above 5,000 mg/dL, the risk jumps past 50%.
Common Causes of Elevated Triglycerides
The most frequent drivers are dietary and lifestyle factors. Eating more calories than you burn, particularly from sugar and refined carbohydrates, directly raises triglyceride production in the liver. Alcohol is another major contributor, especially binge drinking combined with high-fat meals. Being overweight amplifies the effect of all these factors.
Some people have high triglycerides despite reasonable habits. Genetics play a role, and certain conditions like poorly controlled diabetes, thyroid disorders, and kidney disease can push levels up independently.
How to Lower Your Levels
For most people with mild to moderate elevations, lifestyle changes are the first and most effective approach.
Exercise has a reliable triglyceride-lowering effect. The general target is at least 150 minutes of moderate-intensity activity per week, things like brisk walking, cycling, or swimming. For a stronger effect and weight loss, working toward 200 to 300 minutes per week is more effective.
Diet changes make a significant difference. Limiting added sugar is one of the most impactful steps: the American Heart Association recommends no more than 6 teaspoons per day for women and 9 for men. Refined starches like white bread, white rice, crackers, and regular pasta can raise triglycerides in a similar way to sugar, so choosing whole grain versions and keeping portions small helps. Replacing unhealthy fats (fatty meats, high-fat dairy, fried foods) with healthier sources like olive oil, nuts, seeds, and avocado improves the overall picture. Cutting back on alcohol, or eliminating it, removes one of the most direct triggers.
Weight loss amplifies all of these effects. Even a modest reduction of 5 to 10% of your body weight can meaningfully lower triglycerides.
When Medication Becomes Necessary
If your triglycerides are above 500 mg/dL, lifestyle changes alone are often not enough. Medications become important at that level primarily to reduce the risk of pancreatitis. The most commonly used drug classes are fibrates, which can lower triglycerides by 40 to 60%, and prescription-strength fish oil containing omega-3 fatty acids, which can reduce them by 30 to 50%. Statins, more commonly associated with cholesterol management, also lower triglycerides by 20 to 40% and may be used when both cholesterol and triglycerides need attention.
For people in the mild to moderate range, medication decisions depend on overall cardiovascular risk, not the triglyceride number alone. Your provider will look at the full picture: your LDL cholesterol, blood pressure, blood sugar, family history, and other factors before deciding whether a prescription makes sense on top of lifestyle changes.