Normal triglyceride levels fall below 150 mg/dL (1.7 mmol/L). That’s the number you want to see on your lipid panel. Above that threshold, the classifications shift from borderline high to high to very high, and each step carries increasing risks for your heart and other organs.
Triglyceride Ranges at a Glance
Triglycerides are the most common type of fat in your blood. Your body converts excess calories, especially from sugar and alcohol, into triglycerides and stores them in fat cells for later energy use. When levels stay elevated, that stored fat becomes a problem rather than a resource.
- Healthy: below 150 mg/dL (1.7 mmol/L)
- Borderline high: 150 to 199 mg/dL (1.7 to 2.2 mmol/L)
- High: 200 to 499 mg/dL (2.3 to 5.6 mmol/L)
- Very high: 500 mg/dL or above (5.7 mmol/L or above)
If your lab uses mmol/L instead of mg/dL (common outside the United States), you can convert by dividing the mg/dL number by 88.57. So 150 mg/dL equals roughly 1.7 mmol/L.
Why Triglyceride Levels Matter
Elevated triglycerides contribute to the buildup of fatty deposits inside artery walls, which raises the risk of heart attack and stroke. But the relationship between triglycerides and cardiovascular risk goes beyond your total triglyceride number alone. The ratio between your triglycerides and your HDL (“good”) cholesterol is a particularly strong predictor. In one large study, a high triglyceride-to-HDL ratio predicted up to a 16-fold increase in heart attack risk among people with no prior history of heart disease. This ratio appears to be an especially powerful marker in women, where it predicts major cardiovascular events even when arteries don’t show obvious blockages on imaging.
You can calculate this ratio yourself: divide your triglyceride number by your HDL number. A ratio below 2 is generally considered favorable. Above 3 or 4 signals increasing risk.
At the extreme end, very high triglycerides create a separate danger. When levels climb above 1,000 mg/dL, the risk of acute pancreatitis (a painful and potentially life-threatening inflammation of the pancreas) reaches about 10 percent. Above 5,000 mg/dL, that risk exceeds 50 percent. Below 1,000 mg/dL, triglyceride-related pancreatitis is unlikely.
What Raises Triglycerides
The most common drivers are dietary. Refined carbohydrates, sugary drinks, and alcohol all cause your liver to produce more triglycerides. Excess calories of any kind get converted to triglycerides for storage, so consistently eating more than your body burns keeps levels elevated. Carrying extra weight, particularly around the midsection, both results from and contributes to higher readings.
Some medical conditions raise triglycerides independently. Poorly controlled type 2 diabetes, underactive thyroid, and kidney disease all push numbers up. Certain medications do too. Older beta-blockers can slightly raise triglycerides and lower HDL, and high-dose thiazide diuretics (often prescribed for blood pressure) cause a temporary increase. Newer versions of both drug classes have less effect on blood lipids. If your triglycerides climbed after starting a new medication, that connection is worth discussing with your prescriber.
Fasting vs. Non-Fasting Tests
You may have been told to fast for 9 to 12 hours before a lipid panel, and that’s still common practice. But guidelines from the American Heart Association, the American College of Cardiology, and several international bodies now consider a non-fasting blood draw an equal alternative for screening. Total cholesterol and HDL don’t change meaningfully after eating, and non-fasting lipid measurements actually predict cardiovascular risk more accurately in some analyses.
The exception: if your triglycerides are already known to be significantly elevated, a fasting test gives a cleaner baseline for tracking changes over time. For routine screening, though, skipping the fast makes the test more convenient without sacrificing accuracy.
How to Lower Triglycerides
Triglycerides respond to lifestyle changes faster and more dramatically than most other lipid markers. The payoff from exercise, in particular, is substantial. In one study, participants who did high-intensity interval training three times a week for two months reduced their circulating triglycerides by about 28 percent. Their livers also produced roughly 35 percent less of the type of fat particles that carry triglycerides into the bloodstream. You don’t need to run sprints to see benefits, but more vigorous exercise tends to produce larger drops than easy-paced walking.
Dietary changes make an equally large difference. Cutting back on added sugars and refined starches (white bread, pastries, sweetened beverages) directly reduces the raw materials your liver uses to make triglycerides. Replacing those calories with fiber-rich whole grains, vegetables, and healthy fats shifts production in the right direction. Alcohol is a particularly potent trigger. Even moderate drinking can keep triglycerides elevated in people who are sensitive to it, and cutting it out often produces noticeable drops within weeks.
Losing even a modest amount of weight, around 5 to 10 percent of your body weight, typically lowers triglycerides meaningfully.
Omega-3 Supplements
Fish oil supplements lower triglycerides, but the dose required for a real clinical effect is higher than most people expect. The American Heart Association recognizes that 4 grams per day of prescription-strength omega-3 fatty acids can meaningfully reduce triglyceride levels. That’s far more than the 1-gram capsule many people take for general heart health. At lower supplemental doses, each additional gram per day reduces triglycerides by about 6 mg/dL, with larger effects in people whose levels are higher to begin with. Over-the-counter fish oil can help at the margins, but for triglycerides above 200 mg/dL, the prescription-strength formulations are more likely to move the needle.
What Your Number Means in Practice
A single reading below 150 mg/dL, combined with healthy HDL and a good triglyceride-to-HDL ratio, means your triglyceride picture is solid. A borderline result (150 to 199) is a signal to examine your diet and activity level before the number climbs further. Most people in this range can get back below 150 with targeted lifestyle adjustments alone.
Readings in the high range (200 to 499) typically warrant both lifestyle changes and closer monitoring. Your provider may recommend medication if the number doesn’t respond to diet and exercise within a few months, especially if other risk factors like high blood pressure or diabetes are in the picture. Very high levels (500 and above) usually call for more aggressive treatment because of the pancreatitis risk, and lifestyle changes alone may not bring the number down fast enough.
Triglycerides fluctuate more than cholesterol from test to test, so a single elevated reading isn’t necessarily cause for alarm. Trends over two or three tests give a much clearer picture of where you actually stand.