High triglycerides means having more than 150 mg/dL of a specific type of fat circulating in your blood. Triglycerides are the most common fat in your body, used primarily as a compact, efficient energy source. When levels stay elevated over time, they contribute to heart disease and, at very high levels, can trigger a painful and dangerous inflammation of the pancreas.
What Triglycerides Do in Your Body
Triglycerides are fat molecules your body uses to store energy. Because they’re water-repellent, they pack together tightly in fat tissue, making them an incredibly dense fuel reserve. When you eat more calories than you need, your liver converts the excess into triglycerides and ships them out for storage. Between meals, those stored triglycerides get broken back down and released into your bloodstream to fuel your cells.
Since fat can’t dissolve in blood (which is mostly water), triglycerides travel inside protein-coated particles called lipoproteins. A standard lipid panel measures how many triglycerides are floating in these particles at the time of your blood draw. That snapshot tells your doctor whether your body is producing, storing, and clearing fat efficiently, or whether something is off balance.
Normal, Borderline, and High Levels
Triglyceride results fall into three categories above normal:
- Normal: below 150 mg/dL
- Mild: 150 to 199 mg/dL
- Moderate: 200 to 499 mg/dL
- Severe: 500 mg/dL or higher
Most lipid panels are done with a simple blood draw. While fasting for 9 to 12 hours before the test used to be standard, expert panels now support using a single non-fasting sample for routine screening. Your doctor may still request a fasting test if your non-fasting result comes back high, since eating recently can temporarily inflate the number.
Why Triglycerides Rise
The most common driver is straightforward: regularly eating more calories than you burn, especially from carbohydrate-heavy foods. Your liver is efficient at converting excess sugar and starch into triglycerides. Refined carbohydrates like white bread, sugary drinks, and foods with added fructose are particularly potent triggers. Alcohol has an outsized effect too. It’s high in both calories and sugar, and even moderate drinking can push levels up noticeably. People with severely elevated triglycerides are often advised to stop drinking entirely.
Several medical conditions also raise triglycerides as a secondary effect. Type 2 diabetes is one of the most common culprits, along with obesity, hypothyroidism, chronic kidney disease, and fatty liver disease. Less common conditions like Cushing’s disease, lupus, and certain genetic fat storage disorders can do the same.
Medications are another overlooked cause. Steroids like prednisone, certain blood pressure drugs (particularly older beta blockers), some antipsychotic medications, acne treatments containing retinoids, and oral estrogen-based therapies can all elevate triglycerides. If your levels jumped after starting a new medication, that connection is worth raising with your doctor.
Symptoms Are Rare Until Levels Are Very High
Most people with high triglycerides feel nothing at all. The condition is almost always discovered through routine blood work, not symptoms. This is what makes it easy to ignore and why regular lipid screening matters.
At very high levels, a rare skin condition called eruptive xanthomatosis can appear. These are small, pea-sized, waxy bumps that range from yellow to reddish in color, sometimes with a red halo around them. They tend to show up on the buttocks, shoulders, arms, and thighs. The bumps can be itchy and tender. They’re not dangerous on their own, but they’re a visible signal that triglyceride levels are dangerously elevated and need immediate attention.
How High Triglycerides Damage Your Health
Heart Disease
Elevated triglycerides contribute to atherosclerosis, the buildup of fatty plaque inside artery walls. The lipoprotein particles carrying triglycerides are small enough to penetrate the inner lining of arteries. Once inside, they get broken down and absorbed by immune cells, which swell into what researchers call “foam cells.” These foam cells accumulate, driving inflammation and gradually narrowing the artery. Over years, this process raises your risk of heart attack and stroke.
This is why high triglycerides rarely exist as an isolated problem. They tend to travel with low HDL (“good”) cholesterol, higher LDL cholesterol, and insulin resistance, forming a cluster that multiplies cardiovascular risk.
Pancreatitis
The most acute danger of very high triglycerides is pancreatitis, a sudden and severe inflammation of the pancreas that causes intense abdominal pain and often requires hospitalization. The risk climbs steeply once levels exceed 1,000 mg/dL. Among people with triglycerides between 1,000 and 1,999 mg/dL, roughly 10% develop acute pancreatitis. Above 2,000 mg/dL, that prevalence doubles to about 20%. This is a medical emergency, not a long-term risk factor.
Lowering Triglycerides Through Lifestyle
Exercise is the single most effective lifestyle intervention. A single session of aerobic exercise (think a long brisk walk, a bike ride, or a swim) can lower circulating triglycerides by about 30% within 12 to 18 hours. This isn’t a cumulative training effect. It’s an acute response: each bout of exercise speeds up how quickly your body clears triglycerides from the blood while also reducing how much your liver produces. The effect lasts two to three days, which is why consistency matters more than intensity. Regular moderate exercise, most days of the week, keeps triglycerides suppressed.
Dietary changes focus less on cutting fat and more on cutting sugar and refined carbohydrates. Swapping white bread, sweetened beverages, and processed snacks for whole grains, vegetables, and protein can make a meaningful difference within weeks. For people who drink alcohol, reducing or eliminating it often produces a noticeable drop on its own. If you’re carrying extra weight, losing even a modest amount amplifies all of these effects.
When Medication Is Needed
For people whose triglycerides remain high despite lifestyle changes, or whose levels are severe enough to risk pancreatitis, several classes of medication can help.
Fibrates are the most commonly prescribed drugs specifically for high triglycerides. They reduce fasting levels by 25 to 50%, with the biggest drops seen in people who start with the highest numbers.
Prescription-strength omega-3 fatty acids (high-dose fish oil, not the over-the-counter supplement) lower triglycerides by roughly 15 to 25% in most people. For those with markedly elevated levels above 500 mg/dL, prescription omega-3s can achieve reductions of around 30%.
Niacin, a form of vitamin B3, reduces triglycerides by 20 to 50% and has the added benefit of raising HDL cholesterol. However, it can cause uncomfortable flushing and has fallen somewhat out of favor compared to newer options.
For people with rare genetic conditions that cause extreme triglyceride elevations, newer targeted therapies exist that can lower levels by 70 to 80%. These are reserved for severe cases that don’t respond to standard treatment.
Which medication makes sense depends on how high your levels are, what’s driving them, and what other cardiovascular risk factors you have. Lifestyle changes remain the foundation regardless of whether medication is added.