A normal triglyceride level is below 150 mg/dL (1.7 mmol/L) when measured after fasting. That single cutoff applies to adults of all ages and sexes, though the threshold shifts slightly for non-fasting blood draws and is considerably lower for children. Understanding where your number falls on the scale, and what pushes it higher, can help you make sense of your lipid panel results.
The Four Triglyceride Categories
Triglyceride results are grouped into four tiers, each carrying different health implications:
- Healthy: Below 150 mg/dL (1.7 mmol/L)
- Borderline high: 150 to 199 mg/dL (1.7 to 2.2 mmol/L)
- High: 200 to 499 mg/dL (2.3 to 5.6 mmol/L)
- Very high: 500 mg/dL or above (5.7 mmol/L or above)
These cutoffs come from the same framework used by major cardiology organizations and have remained consistent across the most recent clinical guidelines. A reading in the borderline range is worth monitoring and usually responds well to lifestyle changes. Once levels climb above 200, the conversation shifts toward more active intervention. And at 500 or above, the immediate concern isn’t just heart disease; it’s the risk of a painful and potentially dangerous episode of acute pancreatitis.
Fasting vs. Non-Fasting Results
Most traditional lipid panels call for an overnight fast of 9 to 12 hours, and the 150 mg/dL threshold is calibrated to fasting blood. But many labs now draw lipids without requiring a fast, and that changes how you should read your number. For non-fasting tests, an elevated result starts at 175 mg/dL (2.0 mmol/L) rather than 150, because eating within a few hours of the draw naturally bumps triglycerides up.
In practice, fasting is rarely necessary for routine screening. A follow-up fasting test may be useful if your non-fasting triglycerides come back above 400 mg/dL, or if your doctor suspects a genetic lipid disorder. Otherwise, a non-fasting draw gives a reliable picture of your everyday metabolic state.
Children and Teens Have a Lower Threshold
The 150 mg/dL cutoff is an adult standard. For children and adolescents between ages 10 and 19, a normal triglyceride level is below 90 mg/dL. A reading that would look perfectly fine on an adult’s lab report could signal a problem in a teenager. Pediatricians typically check lipids if there’s a family history of early heart disease or if a child has obesity or other metabolic risk factors.
Converting Between Units
Triglyceride results are reported in mg/dL in the United States and in mmol/L in most other countries. To convert mg/dL to mmol/L, divide by 89. To go the other direction, multiply by 89. So a reading of 150 mg/dL equals roughly 1.7 mmol/L, and a reading of 500 mg/dL equals about 5.6 mmol/L.
Why High Triglycerides Matter
Triglycerides are the most common form of fat in your blood. Your body converts calories it doesn’t need right away into triglycerides and stores them in fat cells for later use. That’s normal biology. The trouble starts when levels stay elevated over time, because chronically high triglycerides contribute to the buildup of fatty deposits in artery walls, raising your risk of heart attack and stroke.
At very high levels, the risks go beyond the cardiovascular system. The chance of acute pancreatitis, a sudden and severe inflammation of the pancreas, rises progressively once triglycerides exceed 500 mg/dL. At levels above 1,000 mg/dL, the risk is roughly 5 percent. Above 2,000 mg/dL, it jumps to 10 to 20 percent. Pancreatitis causes intense abdominal pain and often requires hospitalization, so keeping triglycerides well below these thresholds matters.
The Triglyceride-to-HDL Ratio
Your triglyceride number alone doesn’t tell the full story. Dividing your triglycerides by your HDL cholesterol (the “good” cholesterol) gives a ratio that serves as a useful marker for insulin resistance, a condition where your cells stop responding efficiently to insulin. This ratio is essentially a free bonus insight from a standard lipid panel.
The recommended cutoff is about 2.5 for women and 2.8 for men. So if your triglycerides are 125 mg/dL and your HDL is 50 mg/dL, your ratio is 2.5, right at the threshold. A higher ratio suggests your body may be struggling with blood sugar regulation even if your glucose levels still look normal. The ratio performs best in Caucasian, Asian, and Hispanic populations; in African Americans, a lower cutoff of around 2.0 is more accurate.
What Drives Triglycerides Up
Diet is the biggest lever. Refined carbohydrates and added sugars are particularly effective at raising triglycerides because your liver converts excess sugar directly into these blood fats. Alcohol has a similar effect; even moderate drinking can nudge levels into the borderline range, and heavy drinking can push them dramatically higher. Sugary beverages, white bread, pastries, and fruit juice are common culprits people don’t always suspect.
Beyond diet, several other factors push triglycerides higher. Carrying excess weight, especially around the midsection, is closely linked. Physical inactivity plays a role. Conditions like type 2 diabetes, hypothyroidism, and kidney disease can elevate levels independently. Some medications, including certain diuretics, beta-blockers, and estrogen-containing hormone therapies, raise triglycerides as a side effect. And genetics matter: some people inherit a tendency toward high triglycerides regardless of lifestyle, a condition called familial hypertriglyceridemia.
Lowering Triglycerides Through Lifestyle
For most people with borderline or moderately high levels, lifestyle changes are the first and most effective approach. Cutting back on added sugars and refined carbs tends to produce noticeable drops within weeks. Reducing or eliminating alcohol can have a similarly rapid effect. Regular aerobic exercise, even brisk walking for 30 minutes most days, lowers triglycerides and raises HDL at the same time. Losing even 5 to 10 percent of body weight, if you’re carrying extra, can bring meaningful improvement.
Replacing saturated fats with unsaturated fats (think olive oil instead of butter, salmon instead of red meat) also helps. These aren’t dramatic changes individually, but stacked together they can move a borderline reading back into the healthy range without medication.
When Medication Becomes Part of the Plan
If triglycerides stay elevated despite lifestyle changes, or if levels are high enough to pose immediate health risks, medication enters the picture. The options work differently and vary in how much they bring levels down.
Fibrates are the most commonly used drug class for isolated high triglycerides, lowering levels by roughly 30 to 50 percent depending on how high they start. Statins, which are primarily prescribed for LDL cholesterol, also reduce triglycerides by about 10 to 30 percent. Prescription-strength omega-3 fatty acids (these are much higher doses than over-the-counter fish oil supplements) lower triglycerides by around 27 percent when used alone, and by about 21 percent when added on top of a statin. In people with very high triglycerides above 500 mg/dL, prescription omega-3s can achieve reductions of 30 to 35 percent.
For people with an inherited condition called familial chylomicronemia syndrome, where fasting triglycerides exceed 1,000 mg/dL, newer targeted therapies are now available that work by blocking a protein involved in triglyceride metabolism. These are reserved for severe cases where standard treatments aren’t enough and pancreatitis risk is a constant concern.