What Is Severe Hypertriglyceridemia (Very High Triglycerides)?

Written by Keri Wiginton
Medically Reviewed by Melinda Ratini, MS, DO on October 13, 2026

Severe hypertriglyceridemia (sHTG) is when you have very high levels of triglycerides. Triglycerides are one of the most common types of fat, or lipid, in your blood.  

It's normal to have some triglycerides in your bloodstream. Your body uses them to store energy from food. But triglycerides can become a problem when your body can't break them down or clear them well. That can cause levels to rise much higher than they should. 

Doctors usually consider triglycerides that are 500 mg/dL or higher to be severe. Levels above 1,000 mg/dL are extremely high. 

But very high triglycerides are not "just a number," says Sadiya Khan, MD, a cardiologist at the Northwestern Medicine Bluhm Cardiovascular Institute in Chicago. At very high levels, they can also put stress on parts of your body like your heart, blood vessels, liver, and pancreas. 

"Severe elevations are very serious and can increase risk of both heart disease as well as pancreatitis," Khan says. "But we have great options for management that include dietary changes and medications."

When defined as triglycerides above 500 mg/dL, sHTG may affect about 1 in 88 people, or roughly 3 million U.S. adults. 

But estimates vary, depending on the cutoff used and whether researchers are looking at genetic, mixed, or unclear causes.

You can have very high triglycerides and feel fine. 

Many people first find out they have sHTG after one or more bouts of acute pancreatitis. That's sudden inflammation of the pancreas, which is life-threatening. 

"Acute pancreatitis is very, very painful, just excruciatingly painful," says Daniel F. Vatner, MD, PhD, an endocrinologist with Yale Medicine in New Haven, Connecticut. "And it can lead to a lifetime of something called chronic pancreatitis, where occasionally eating will be painful." 

Get medical help right away if you have warning signs of acute pancreatitis, especially severe belly pain with nausea or vomiting.

 Doctors often put sHTG causes into two main groups: 

  • Primary causes, which are mainly inherited or genetic 
  • Secondary triggers, such as health conditions, medicines, alcohol, or diet 

Many people have both a built-in tendency toward high triglycerides and an added trigger. But that doesn't mean very high levels are your fault. 

"Except in extremely rare circumstances, most anyone with severe hypertriglyceridemia is thought to have some kind of genetic predisposition." Vatner says. "However, usually you need some kind of secondary factor as well."

Common causes and triggers doctors look for:

Familial hyperchylomicronemia syndrome (FCS). FCS is a rare inherited condition that makes it very hard for the body to clear triglycerides from the blood. Triglycerides often rise above 1,000 mg/dL and may go into the thousands. 

Multifactorial chylomicronemia syndrome (MCS). MCS is more common than FCS. It happens when changes in several genes (called polygenic) make you more likely to have very high triglycerides. And then other things (diabetes, insulin resistance, alcohol, obesity, medicines) often push levels higher.

Other inherited lipid disorders. Some conditions that run in families can also raise triglycerides. These include familial hypertriglyceridemia and familial combined hyperlipidemia.

Type 2 diabetes or insulin resistance. Insulin helps your body manage sugar and fat. When it doesn't work well, your liver may make more triglycerides than normal and your body may clear them more slowly. 

Metabolic syndrome. This is a group of health issues linked to high blood sugar, high blood pressure, excess belly fat, and high cholesterol or triglyceride levels.  

Low thyroid (hypothyroidism). Thyroid hormones help control how your body uses energy. When thyroid levels are low, your body may not manage fats very well. 

Alcohol use. Your liver breaks down alcohol, which can slow the way it handles fat and make triglycerides harder to control. 

High-fat foods. Fat from food becomes triglycerides in your blood. If your body can't clear triglycerides well, high-fat meals can make levels climb higher quickly. 

High-sugar drinks and foods. Your body can turn excess calories from sugars into fat. This happens easily with fructose, which is found in many sweet drinks and foods. 

Certain medications. Your doctor can review what you take to see if any could be part of the problem. Drugs commonly linked to higher triglycerides include some birth control pills, blood pressure drugs, antipsychotics, and corticosteroids. 

Pregnancy. Triglycerides can go up during pregnancy. This happens because of hormone changes that help move more fat into the blood. If your body already has trouble clearing triglycerides, your levels may reach severe status.

Your doctor can measure your triglycerides with a routine blood test called a lipid panel. Healthy adults should get one at least every four to six years. It's the same test that checks cholesterol. 

If results show very high triglycerides, your doctor may give you follow-up tests to check for: 

  • High blood sugar 
  • Low thyroid hormone
  • Kidney or liver problems
  • Other cholesterol or lipid problems

This matters because treatment depends on the cause. If your doctor thinks FCS or another inherited lipid disorder may be involved, they'll likely refer you to a lipid specialist or geneticist for genetic testing.

Your doctor may also ask about: 

  • Your family medical history
  • Medications you take
  • What you eat or drink
  • Any past bouts of pancreatitis
  • If you've had high triglycerides from a young age

Guidelines suggest kids get their first cholesterol check between ages 9 and 11. Most kids won't have sHTG. But people born with lipid disorders can have very high triglycerides from a young age and may be at risk of pancreatitis sooner.

Finding out you have very high triglycerides can feel scary. But there are clear ways to bring levels down and lessen your chances of serious problems down the road. 

The main goals are to: 

  • Prevent acute or chronic pancreatitis.
  • Lower long-term heart disease and stroke risk.
  • Find and treat things pushing triglycerides higher.

Your exact plan depends on how high your triglycerides are, whether you've had pancreatitis, and what's causing your levels to rise. 

Here's how your doctor might approach treatment:  

When your triglycerides are extremely high

If your fasting triglycerides are around 880 mg/dL or higher, your doctor may focus first on getting them down quickly. This is especially important if you have acute pancreatitis or you've had pancreatitis before. 

Your doctor may have you: 

Fast for a short time. You may need to stop eating for a bit so no new fat enters your blood. If you have pancreatitis, your doctor may have you stay in the hospital for a few days so they can give you fluids and safe nutrition.  

Fix other health problems. If you have a medical condition, such as uncontrolled diabetes or low thyroid, your doctor will help you figure out how to better manage them.

Start triglyceride-lowering medication. Standard drugs, such as fibrates or statins, may not help much on their own at this stage. But your doctor may start them anyway so they're in place when your levels fall. If you have a rare heredity condition called familial chylomicronemia syndrome (FCS), your doctor may suggest a medication like olezarsen (Tryngolza) or plozasiran (Redemplo) along with diet to reduce triglycerides.

Work with your care team on lifestyle changes. Healthy habits are a key part of treatment for very high triglycerides. Your doctor may refer you to a registered dietitian or other specialist to help create a diet and exercise plan that fits your health needs.

Medications for sHTG 

When triglycerides fall below 880 to 1,000 mg/dL, medications may work better to prevent dangerous spikes. 

Your doctor may use: 

Fibrates. These are medicines used specifically to lower triglycerides. 

Examples are: 

  • Fenofibrate (Antara, Lipofen)
  • Gemfibrozil (Lopid) 

They may not be safe for you if you have kidney or liver disease.

Statins. These are cholesterol medicines. They may lower triglycerides a little, but they're mainly used to reduce cholesterol and help guard against heart disease and stroke. 

Some examples are: 

  • Atorvastatin (Lipitor)
  • Rosuvastatin (Crestor)

High-dose omega-3 fatty acids. Your doctor may prescribe a concentrated version of omega-3 fatty acids. These medications are different from the kind of fish oil supplements you buy in the store.  

Examples include: 

  • Icosapent ethyl (Vascepa)
  • Omega-3-acid ethyl esters (Lovaza)

High-dose niacin. Some doctors may still use this to lower triglycerides. But niacin is used less often now because of side effects and safety concerns.

New kinds of triglyceride-lowering treatment 

Your doctor may suggest more targeted treatments, especially if you have FCS or levels that stay in the severe range despite standard drugs.

These newer medicines work in a different way from older drugs, like statins and fibrates. Instead of lowering triglycerides indirectly, they target a protein called APOC-III. This protein makes it harder for the body to clear fat from the blood.

Approved drugs include:

Olezarsen (Tryngolza): Approved for adults with FCS, and as of June 2026, for use with diet in adults with severe hypertriglyceridemia to reduce triglycerides and lower the risk of acute pancreatitis

Plozasiran (Redemplo): Approved for adults with FCS

These drugs aren’t right for everyone. They can be expensive or hard to get approved by insurance. But if you have FCS, hypertriglyceridemia, or have repeated pancreatitis, it's worth asking your doctor if a targeted treatment may help.

No matter which treatments you use, you'll need ongoing care. 

Your plan may include: 

  • Regular lab tests to check your triglycerides
  • Follow-up visits to watch for health problems 
  • Changes to your diet, activity, and medicines

You may see your care team every few months at first, then less often once your triglycerides are under control. Your doctor can tell you what schedule makes sense for you. 

How your condition might change over time

Once you and your doctor get your levels under control, they can often stay in a safer range for a long time. But sometimes, levels can go up quickly if something changes or stresses your body. 

Your triglycerides may shoot up if:

  • You get a bad infection.
  • Your diabetes suddenly gets out of control.
  • You miss an insulin dose or other key medicines.
  • You have a very high-fat meal.
  • You start drinking more alcohol. 

That's why regular check-ins with your care team are so important. They can help you catch changes early, before serious problems happen.

Bring a list of questions to your appointment. You may want to ask:

  • How high are my triglycerides?
  • What may be driving my levels higher?
  • What health problems are we trying to prevent?
  • Do I need fasting blood tests?
  • How often should I have my triglycerides checked?
  • What symptoms mean I should call you?
  • What symptoms mean I should go to the ER?
  • What's our first treatment goal?
  • Which medicines are you recommending, and why?
  • When should I expect my numbers to change?
  • Should I see an endocrinologist, cardiologist, lipid specialist, or genetic counselor?
  • Should I be tested for FCS or another inherited lipid disorder?
  • Can you refer me to a dietitian who understands very low-fat diets?
  • Are newer medicines or clinical trials right for me?
  • How do I talk to my family about the support I need?

Your regular doctor may be the first to diagnose sHTG. But if your levels are extremely high, stay very high, or you've had pancreatitis, you may need a "multidisciplinary" approach. 

Your team may include:  

  • Endocrinologist: Can treat diabetes, insulin resistance, and thyroid disease
  • Cardiologist: Helps lower your odds of heart and blood vessel problems 
  • Lipid specialist: Focuses on cholesterol and triglyceride disorders
  • Registered dietitian: Helps you make food changes you can live with
  • Geneticist: Helps with genetic testing 

For more help finding expert care, ask your doctor for a referral to a lipid specialist. You can also search the National Lipid Association's Find a Clinician tool or ask a nearby academic medical center whether it has a lipid clinic. Even one specialist visit may be worth it to fine-tune your plan.

If sHTG goes untreated, it can lead to: 

  • Repeated or chronic pancreatitis
  • Heart attack and stroke  
  • Fatty liver disease (MASLD)

Getting your triglycerides under control can help prevent these problems.

Living with sHTG can feel overwhelming at first. But there are steps you can take to live well with this condition. 

It helps to: 

  • Keep up with blood tests.
  • Take medicines as prescribed. 
  • Manage other health conditions.
  • Follow a low-fat diet, if needed.
  • Limit sugar and avoid alcohol. 
  • Get regular exercise, even short, brisk walks.
  • Ask for help when treatment feels hard.

With the right support, you and your doctor can lower your triglycerides and guard against serious problems. 

Getting support

Ask your doctor if there are lipid clinics, dietitians, genetic counselors, or social workers near you who work with people who have very high triglycerides. 

You can also find education and support through groups such as: 

Groups such as The Assistance Fund (for FCS) or NORD's RareCare patient assistance programs may be able to help with treatment-related expenses. 

Caring for your emotional health

Living with sHTG can be stressful, especially if you've had pancreatitis and worry about it happening again. You may also feel judged or blamed because treatment often focuses on food, exercise, alcohol, or weight.   

But think of lifestyle changes as tools to help your body work better with the genes you have, not a punishment. 

Tell your doctor if the changes they're asking you to make feel too hard or affect your daily life. That might look like being afraid to eat, avoiding social meals, or feeling shame, anxiety, or stress about your health. 

A dietitian, physical therapist, or therapist who understands chronic illness can help you make changes that are good for you and still let you enjoy your life. 

Information for caregivers

If someone you care about has sHTG, here are some ways you can help: 

  • Learn about very high triglycerides.
  • Support their food and alcohol changes.
  • Encourage follow-up care.
  • Make time for your own health and support.

If your child has FCS, work with a specialist team, such as a pediatric endocrinologist or lipid clinic. Meet with a dietitian who understands very low-fat diets in kids. It may also help to connect with other families facing the same rare condition.

Severe hypertriglyceridemia means your triglycerides are high enough to raise your odds of serious problems, such as heart, liver, or pancreas problems. But treatment can help. You may need diet and lifestyle changes along with medication.

The right plan depends on your triglyceride level, what's causing your levels to rise, and whether you have a genetic condition such as FCS.  

A lipid specialist, endocrinologist, or cardiologist can help you figure out what lifestyle changes and medications are best for you.

Can sHTG go away?

Triglycerides may come down if you treat what's driving them, such as diabetes, low thyroid, alcohol use, or certain medicines. But if you have a genetic tendency, you may always be more likely to have high triglycerides and need to keep up with diet changes and medications.

What's the difference between triglycerides and cholesterol?

Triglycerides and cholesterol are both fats in your blood, but they do different jobs. High levels of either can affect your heart and blood vessels, but very high triglycerides also raise the chances of pancreatitis.

Do GLP-1 drugs treat severe high triglycerides?

GLP-1 drugs are not a direct treatment for sHTG. But they may help some people by improving blood sugar, weight, or appetite. Ask your doctor if a GLP-1 medicine is safe for you, especially if you've had pancreatitis.

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