A normal triglyceride level for adults is below 150 mg/dL (1.7 mmol/L). That’s the threshold used by the National Heart, Lung, and Blood Institute and most major medical guidelines. Above that number, levels are classified into escalating categories: borderline high (150 to 199 mg/dL), high (200 to 499 mg/dL), and very high (500 mg/dL and above). For children and teenagers ages 10 to 19, the bar is lower: below 90 mg/dL is considered normal.
What Triglycerides Actually Do
Triglycerides are your body’s main form of stored energy. Each molecule is built from three fatty acids attached to a small backbone of glycerol. When you eat more calories than you need immediately, your body converts the excess into triglycerides and tucks them away in fat tissue and muscle. Between meals, hormones signal those stores to break down and release energy back into the bloodstream.
Insulin plays a key role in this system. After a meal, insulin helps direct triglycerides into fat cells for storage. When you haven’t eaten for a while, a different hormone (glucagon) encourages muscles to pull triglycerides apart and burn them for fuel. This back-and-forth is normal and healthy. Problems start when the system stays overloaded, keeping triglyceride levels in your blood persistently elevated.
How Triglyceride Categories Break Down
- Healthy: Below 150 mg/dL
- Borderline high: 150 to 199 mg/dL
- High: 200 to 499 mg/dL
- Very high: 500 mg/dL and above
These categories aren’t arbitrary cutoffs. Heart disease risk rises as triglycerides climb above 150, and once levels cross 500 mg/dL, the risk of acute pancreatitis (a painful, potentially dangerous inflammation of the pancreas) increases progressively. At levels above 1,000 mg/dL, roughly 5 percent of people develop pancreatitis. That number jumps to 10 to 20 percent when levels exceed 2,000 mg/dL.
If you’re outside the United States, your lab results may use mmol/L instead of mg/dL. To convert, multiply your mg/dL number by 0.0113. So 150 mg/dL equals about 1.7 mmol/L.
Getting Your Levels Tested
Triglycerides are measured through a standard blood draw, typically as part of a lipid panel that also checks your cholesterol numbers. Most guidelines recommend fasting for 9 to 12 hours before the test because eating raises triglycerides temporarily, and a fasting number gives a cleaner baseline. That said, research published in Circulation found that non-fasting triglycerides predict cardiovascular risk similarly well, and some clinicians now order non-fasting panels for convenience. If your result comes back elevated on a non-fasting test, your doctor may ask for a repeat fasting measurement to confirm.
A single high reading doesn’t necessarily mean you have a problem. Triglycerides fluctuate with recent meals, alcohol intake, illness, and even time of day. Persistently elevated levels across two or more tests are what matter for long-term health decisions.
What Pushes Triglycerides Up
The most common driver is excess calorie intake, particularly from refined carbohydrates and added sugars. Your liver converts surplus sugar into triglycerides very efficiently, which is why a diet heavy in sweetened drinks, white bread, and processed snacks can spike levels even in people who don’t eat much fat. Alcohol has a similar effect because the liver prioritizes breaking down alcohol and shunts other calories into triglyceride production.
Beyond diet, several other factors raise triglycerides. Carrying extra weight (especially around the midsection), physical inactivity, insulin resistance, type 2 diabetes, an underactive thyroid, and kidney disease all contribute. Genetics play a role too. Some people inherit conditions that impair their body’s ability to clear triglycerides from the blood, leading to very high levels regardless of lifestyle.
Certain medications can also push numbers up. Some older blood pressure drugs, including thiazide diuretics and older beta blockers, cause temporary rises in triglycerides. If you notice your levels climbing after starting a new medication, that connection is worth discussing with whoever prescribed it.
Why Elevated Levels Matter
Mildly elevated triglycerides on their own don’t cause symptoms you’d notice day to day. Their danger is cumulative. High triglycerides contribute to the buildup of fatty deposits in artery walls, raising the risk of heart attack and stroke over years. They also tend to travel with other metabolic problems: low HDL (“good”) cholesterol, higher LDL (“bad”) cholesterol, and insulin resistance. This cluster is more dangerous together than any single number in isolation.
At the extreme end, very high triglycerides (above 500 mg/dL) create a more immediate risk. The pancreas can become inflamed when the blood is saturated with fat-carrying particles, and pancreatitis episodes at these levels can be severe enough to require hospitalization.
Lowering Triglycerides Through Lifestyle
Lifestyle changes are the first line of treatment at every level of elevation, and they’re remarkably effective. According to the 2026 ACC/AHA guidelines on cholesterol management, highly responsive individuals can see triglyceride reductions of more than 70 percent through lifestyle changes alone. Harvard Health reports that combining a healthier diet, regular exercise, and weight loss can lower levels by more than 50 percent for many people.
The highest-impact changes are straightforward. Cutting back on added sugars and refined carbohydrates removes the raw material your liver uses to overproduce triglycerides. Replacing those calories with vegetables, whole grains, and foods rich in omega-3 fatty acids (like salmon, sardines, and walnuts) nudges the balance in the right direction. Regular aerobic exercise, even moderate activity like brisk walking for 30 minutes most days, helps your muscles burn triglycerides more efficiently. Losing even 5 to 10 percent of your body weight can produce noticeable improvements. And if you drink alcohol, reducing or eliminating it is one of the fastest ways to see triglycerides drop.
When Medication Becomes Part of the Plan
For people whose triglycerides stay elevated despite lifestyle changes, or who face higher cardiovascular risk, medication enters the picture. Statins remain the foundation of drug treatment for elevated triglycerides in the 150 to 499 mg/dL range, particularly when overall heart disease risk is elevated. They’re better known for lowering LDL cholesterol, but they bring triglycerides down as well.
At the very high end (1,000 mg/dL and above), the treatment priority shifts toward preventing pancreatitis. The 2026 guidelines recommend a newer class of medication for people with a genetic condition called familial chylomicronemia syndrome who can’t get levels under control through diet alone. For people with existing heart disease and persistently elevated triglycerides, a concentrated omega-3 prescription medication may be considered alongside statin therapy to further reduce cardiovascular risk.
The goal of treatment isn’t necessarily to reach a specific triglyceride number. It’s to lower your overall risk of heart disease and pancreatitis by bringing levels as close to the healthy range as possible, using whatever combination of lifestyle and medication gets you there.