High Triglycerides: What Your Levels Mean and How to Lower Them

If you're looking at a lab report with the word "triglycerides" on it, you may be confused about what they are and how they relate to cholesterol and heart health.

Triglycerides are a type of fat your body uses for energy, not a form of cholesterol, even though the two travel together in your blood and get tested together on the same panel. A healthy level is under 150 milligrams per deciliter (mg/dL), and higher levels can add to plaque buildup in your arteries, with very high levels carrying a separate risk of their own.

Below, we'll break down what triglycerides do in your body, what your specific number means, what tends to drive it up, and what actually helps bring it back down.

What Are Triglycerides?

Think of your bloodstream as a delivery network. Fat and cholesterol don't dissolve in blood on their own, the same way oil doesn't mix with water, so your body wraps them in small round packages called lipoproteins to move them around. Picture these packages as delivery vehicles, each one carrying cargo to different parts of your body.

Cholesterol is one kind of cargo these vehicles carry, used to build cell walls and make certain hormones. Triglycerides are a different kind of cargo entirely: stored energy, made from calories you ate but didn't burn off right away. Your liver packages up extra sugar, fat, or alcohol into triglycerides and sends them out for storage or later use as fuel, mostly in fat tissue and muscle.

Two vehicle types carry mostly triglyceride cargo. Right after a meal, your gut releases particles called chylomicrons, packed almost entirely with triglycerides from the food you just ate. Between meals, your liver makes a similar vehicle called VLDL (very low-density lipoprotein), built to carry triglycerides your liver made from leftover calories. Both empty out their triglyceride cargo at muscle and fat tissue, where it either gets burned for energy or stored for later.

This matters for one more reason. Once a vehicle drops off most of its triglyceride cargo, what's left behind is called a remnant particle, and it can still carry some cholesterol. Those remnants are part of a related number called non-HDL cholesterol.

What Is a Normal Triglyceride Level?

Your triglyceride level comes from the same blood draw as the rest of your cholesterol panel, so there's no separate test to schedule. The result falls into one of four categories, according to the National Heart, Lung, and Blood Institute:

A few practical notes worth knowing. Unlike LDL cholesterol, which can be measured accurately whether or not you've eaten recently, triglycerides rise temporarily after a meal, so your doctor may ask you to fast for nine to 12 hours before this specific blood draw for the most accurate reading.

What Causes High Triglycerides?

High triglycerides usually come from a mix of everyday habits, underlying health conditions, and sometimes genetics. Doctors sometimes describe these as "secondary" causes, meaning triglycerides are elevated because of something else going on, rather than a stand-alone problem.

Diet and Lifestyle

Extra calories from added sugar and alcohol get converted into triglycerides in your liver, so a diet heavy in either one is one of the most common drivers of a high result. Not moving your body enough plays a role too. Exercise helps your muscles use up circulating triglycerides for fuel, so inactivity leaves more of them behind in your blood.

Excess Weight

Carrying extra weight, especially around the abdomen, is closely linked to higher triglycerides. Fat tissue itself becomes less able to store fat efficiently when there's too much of it, so more of it circulates in the blood as triglycerides instead.

Health Conditions

Diabetes and prediabetes raise triglycerides because insulin, the hormone that normally helps clear triglycerides from the blood, isn't working properly. An underactive thyroid, as well as kidney and liver disease, can also drive triglycerides up.

Medications and Genetics

Certain medications, including some used for breast cancer, HIV, and high blood pressure, can raise triglycerides as a side effect. Some people also inherit a genetic tendency toward high triglycerides, and this runs more common in people of South Asian ancestry.

Why Do High Triglycerides Matter for Your Heart?

High triglycerides create risk in two separate ways, and it's worth keeping them distinct.

High Triglycerides Increase Your Heart Health Risk

High triglycerides tend to travel with low HDL cholesterol and higher LDL or non-HDL cholesterol, a combination that speeds up plaque buildup inside your artery walls. Remember the remnant particles from earlier?

Research has found that these leftover triglyceride-carrying vehicles still deposit cholesterol cargo into artery walls on their way out of circulation, and that remnant cholesterol is an independent, causal risk factor for heart disease in its own right, not just a side effect of high triglycerides.

Keep in mind that a lipid panel gives you numbers, not a picture. It can't show whether plaque has already built up in your arteries, but a heart scan can. A coronary artery calcium score takes only minutes, costs little, and picks up hard plaque. CCTA is a bigger investment, but it also reveals soft plaque and shows whether any artery has narrowed. That matters because soft plaque is the kind research ties most closely to heart attacks.

Very High Triglycerides Affect Your Pancreas

Once triglycerides climb above 500 mg/dL, you face a real risk of acute pancreatitis, a sudden and painful inflammation of the pancreas that can require hospitalization.

This isn't a heart risk at all, it's a distinct complication that happens when there's simply too much fat circulating in the blood at once.

How Do Triglycerides Relate to Cholesterol?

Triglycerides and cholesterol are often mentioned in the same breath, but they aren't the same thing. Here's how they compare:

The two numbers are connected, not separate stories. As triglyceride-carrying vehicles drop off their fuel cargo, they turn into the remnant particles counted in your non-HDL cholesterol number. That's why a high triglyceride result often comes with a high non-HDL result too.

How Can You Lower High Triglycerides?

The good news is that triglycerides tend to respond quickly to changes, often faster than LDL cholesterol does. Both lifestyle changes and medicines can make a big difference.

Lifestyle changes usually come first. Try to:

• Cut back on added sugar and refined carbohydrates, since your liver converts extra sugar into triglycerides.
• Limit alcohol, which your liver also converts directly into triglycerides.
• Get regular exercise, which helps your muscles burn through circulating triglycerides for fuel.
• Lose excess weight if you're carrying extra, especially around your midsection.

Making these changes can lower triglycerides by a meaningful amount within just a few weeks, well before other cholesterol numbers typically start to shift.

If your triglycerides stay high despite diet and exercise changes, or if they're very high from the start, your doctor may recommend medication:

• Prescription-strength omega-3 medication called icosapent ethyl has been shown to reduce heart attacks and strokes in people with high triglycerides who are already on a statin, in a large clinical trial called REDUCE-IT.
• Other medications called fibrates work by helping your body clear triglycerides from the blood faster, and are sometimes used for very high levels to reduce pancreatitis risk.
• Treating an underlying cause, like diabetes or thyroid issues, often brings triglycerides down as a side effect too.

Whichever path applies to you, your doctor will typically recheck your triglycerides after a few months to see whether the changes are working, since this number tends to move faster than LDL or non-HDL cholesterol in response to treatment.

The Bottom Line on Triglycerides

Triglycerides are stored energy, not a type of cholesterol, though the two travel together in your blood and show up on the same lab panel.

A level under 150 mg/dL is healthy, and higher levels can add to plaque buildup in your arteries, with very high levels above 500 mg/dL also carrying a separate risk of pancreatitis. Fortunately, high levels of triglycerides are treatable with medications and lifestyle changes.