Triglycerides are a type of fat circulating in your blood that your body uses for energy. When you eat more calories than you need right away, whether from sugar, fat, or alcohol, your body converts those extra calories into triglycerides and stores them in fat cells for later use. A standard blood test called a lipid panel measures your triglyceride level alongside your cholesterol, and a healthy reading falls below 150 mg/dL for adults.
How Triglycerides Differ From Cholesterol
Triglycerides and cholesterol are both fats in your blood, but they do different things. Triglycerides store unused calories and release them between meals when your body needs fuel. Cholesterol, on the other hand, is a waxy substance your body uses to build cells and produce hormones. Both travel through your bloodstream on protein carriers called lipoproteins.
You’ve probably heard of LDL (“bad”) cholesterol and HDL (“good”) cholesterol. LDL makes up most of your body’s cholesterol and can build up in artery walls. HDL works in the opposite direction, picking up excess cholesterol and shuttling it back to the liver for disposal. Triglycerides are measured on the same blood test as these cholesterol types, but they represent a separate risk factor. You can have normal cholesterol and still have elevated triglycerides, or vice versa.
What the Numbers Mean
The National Heart, Lung, and Blood Institute breaks triglyceride levels into four categories:
- Healthy: Below 150 mg/dL for adults (below 90 mg/dL for children and teens ages 10 to 19)
- Borderline high: 150 to 199 mg/dL
- High: 200 to 499 mg/dL
- Very high: 500 mg/dL or above
These numbers come from a lipid panel, which is a simple blood draw. Traditionally, doctors required a 9- to 12-hour fast before the test to get accurate results. That recommendation is shifting. Research published in the Journal of the American College of Cardiology found that eating a normal meal raises triglycerides by an average of only 26 mg/dL, a difference that rarely changes clinical decisions. Multiple medical societies in the U.S., Europe, Canada, and elsewhere now endorse non-fasting lipid panels for most patients. Your doctor may still request a fasting test if your levels are borderline or if a more precise reading would change your treatment plan.
What Causes High Triglycerides
Because your body converts surplus calories into triglycerides, lifestyle plays a major role. The most common dietary drivers are excess sugar, refined carbohydrates, and alcohol. Binge drinking paired with a high-fat meal can spike levels dramatically. Being physically inactive also contributes, since your muscles aren’t burning through stored energy as quickly.
Several medical conditions raise triglycerides independently of diet. Poorly controlled type 2 diabetes, thyroid disorders, kidney disease, and liver disease can all push levels higher. Some medications raise triglycerides as a side effect.
Genetics matter too. Several inherited lipid disorders cause persistently elevated triglycerides regardless of lifestyle. Familial hypertriglyceridemia runs in families and keeps levels chronically high. A rarer condition called familial chylomicronemia syndrome can push triglycerides above 1,000 mg/dL. If your levels are stubbornly high despite a healthy diet and exercise, a genetic component may be involved.
Health Risks of Elevated Levels
Persistently high triglycerides increase your risk of cardiovascular disease. They contribute to the hardening and narrowing of artery walls, which raises the odds of heart attack and stroke. This risk exists on a spectrum: the higher your levels, the greater the concern, especially when combined with high LDL cholesterol or low HDL cholesterol.
At very high levels, the more immediate danger is acute pancreatitis, a painful and potentially life-threatening inflammation of the pancreas. This happens when large fat-rich particles clog the tiny blood vessels feeding the pancreas, cutting off blood flow and damaging tissue. The risk is low when triglycerides stay below 1,000 mg/dL, but at levels above 1,000, roughly 1 in 10 people will develop pancreatitis. Above 5,000 mg/dL, the risk climbs past 50 percent. Severe hypertriglyceridemia is the third most common cause of acute pancreatitis overall, accounting for about 9 percent of cases.
Physical Signs at Extreme Levels
Most people with moderately high triglycerides feel nothing at all. The condition is typically silent, which is why blood testing is the only reliable way to detect it. Physical signs only appear when levels are sustained well above 1,000 mg/dL.
Eruptive xanthomas are small, yellow, pinhead-sized bumps that develop on the back, buttocks, chest, and thighs. They form when fat-laden particles accumulate inside immune cells in the skin, and they gradually disappear once triglycerides drop back below 1,000 mg/dL. At extremely high levels (above 2,000 to 4,000 mg/dL), an eye exam can reveal a condition called lipemia retinalis, where the blood vessels in the retina take on a pale, milky appearance due to the sheer volume of fat in the blood. Orange-yellow discoloration in the creases of the palms, though rare, points specifically to an inherited lipid disorder called dysbetalipoproteinemia. An enlarged liver or spleen can also occur with severe, sustained elevation.
Lifestyle Changes That Lower Triglycerides
Diet adjustments are the first and most effective intervention for most people. The biggest lever is reducing added sugar. The National Lipid Association supports the American Heart Association’s guideline of no more than 6 teaspoons of added sugar per day for women and 9 teaspoons for men. For reference, a single can of regular soda contains about 10 teaspoons. Candy, pastries, ice cream, sweetened yogurts, fruit-flavored drinks, sports drinks, and energy drinks are all significant sources.
Refined carbohydrates, like white bread, white rice, and pasta, convert quickly to sugar in the body and have a similar effect on triglycerides. Swapping them for whole grains, vegetables, and fiber-rich foods helps. Cutting back on alcohol is particularly impactful, since alcohol directly stimulates triglyceride production in the liver. For people with very high levels, avoiding alcohol entirely is often recommended.
Regular physical activity helps your muscles burn through stored triglycerides. Even moderate exercise like brisk walking, done consistently, lowers levels over time. Losing excess weight has a compounding effect, since it reduces the surplus calories available for conversion into triglycerides.
When Medication Is Needed
For people with persistently elevated triglycerides between 150 and 499 mg/dL, the 2026 American College of Cardiology/American Heart Association guidelines recommend a combination of lifestyle changes and, depending on overall heart disease risk, statin therapy. Statins remain the foundation of treatment because they reduce cardiovascular events, not just triglyceride numbers.
At levels above 500 mg/dL, the priority shifts toward preventing pancreatitis. If lifestyle changes and addressing any underlying conditions don’t bring levels down enough, doctors may add fibrate medications or prescription omega-3 fatty acids specifically to lower triglycerides. People with levels above 1,000 mg/dL are typically advised to follow a very-low-fat diet alongside medication. One important safety note: the fibrate gemfibrozil should not be combined with a statin due to a serious drug interaction risk, so doctors use alternative options when both are needed.
For many people, triglycerides respond well to lifestyle changes alone. The gap between a borderline reading and a healthy one can often be closed by cutting back on sugar, refined carbs, and alcohol while staying physically active.