A night of heavy drinking can push your triglycerides measurably higher by the next morning. That is what makes this blood fat so wilful: it responds quickly to what you eat and drink, in both directions. Triglycerides are part of your lipid profile, alongside your cholesterol. High values can raise your risk of cardiovascular disease. The good news, and my take: of all the fat values, triglycerides are often the quickest to influence.
What are triglycerides?
Triglycerides are the most common form of fat in your body. After eating, your body converts calories you do not immediately need into triglycerides, stored in fat cells. Between meals they are released again as energy. The problem arises when you structurally take in more than you burn: your triglyceride level then stays raised.
Normal triglyceride values
Triglycerides are measured fasting, after 8 to 12 hours without food. The table below lists the values in mmol/L, with what they mean and a logical next step.
| Value (fasting) | Assessment | Roughly what it means |
|---|---|---|
| below 1.7 mmol/L | normal | favourable, an annual check is usually enough |
| 1.7 to 2.2 mmol/L | borderline | tighten lifestyle, have it remeasured |
| 2.2 to 5.6 mmol/L | high | discuss with your doctor in the context of your profile |
| above 5.6 mmol/L | very high | added risk of pancreatitis, consult a doctor |
Causes of high triglycerides
- Diet: lots of sugar, refined carbohydrates and alcohol
- Overweight: belly fat in particular is linked to higher triglycerides
- Little exercise: activity helps burn triglycerides
- Alcohol: even moderate use can drive the value up sharply
- Type 2 diabetes: insulin resistance raises production
- Thyroid: an underactive thyroid can play a role
- Genetic predisposition: familial hypertriglyceridaemia
If you see high triglycerides together with a raised blood sugar, read our pillar on blood sugar and insulin resistance.
Lowering triglycerides: what works
Lifestyle is often the first and most effective step. Much of it overlaps with lowering cholesterol without medication. The Netherlands Nutrition Centre (Voedingscentrum) advises replacing saturated fat with unsaturated fat and limiting sugary drinks, precisely because fast sugars drive triglycerides up sharply.
- Limit sugar and fast carbohydrates: this has the quickest effect
- Drink less alcohol: even a short break can help
- Eat more omega-3: oily fish, walnuts, flaxseed
- Exercise regularly: the guideline is around 150 minutes per week
- Lose weight if overweight: 5 to 10% weight loss can lower triglycerides by 20 to 30%
What does a realistic lowering plan look like?
Triglycerides respond quickly, but that does not mean one healthy week is enough. A realistic approach looks roughly like this:
- Week 1 to 2: cut the biggest sugar sources, such as soft drinks and biscuits, and take an alcohol break. This often gives the fastest drop.
- Week 2 to 4: replace fast carbohydrates with wholegrain versions, add oily fish twice a week and build up movement towards around 150 minutes a week.
- After 4 to 6 weeks: have it remeasured fasting. If you are overweight, 5 to 10% weight loss can lower triglycerides considerably further.
If the value stays high despite lifestyle, your doctor assesses whether an underlying cause is at play, such as a thyroid problem or a hereditary predisposition.
Triglycerides and your heart risk
Raised triglycerides are an independent risk factor for cardiovascular disease. Together with a low HDL and a high LDL cholesterol, they form an unfavourable pattern that doctors call the "atherogenic lipid profile". The Dutch Heart Foundation (Hartstichting) therefore places raised triglycerides in the broader context of your total risk, not as a stand-alone number. A strongly raised value, above 5.6 mmol/L, calls for extra attention because the risk of pancreatitis then rises.
Common misconceptions
Stubborn myths surround triglycerides. A few worth setting straight:
- "Eating fat causes high triglycerides": not the main cause. Sugar, fast carbohydrates and alcohol usually drive the value up more than fat does.
- "Being slim protects you": even at a healthy weight you can have raised triglycerides, especially with a lot of alcohol or a hereditary predisposition.
- "One good result is enough": triglycerides swing a lot with what you recently ate and drank. A trend says more than a single snapshot.
Frequently asked questions
Do I need to fast for the measurement?
Yes, not eating for 8 to 12 hours gives a more reliable result. Water is fine. After a meal, triglycerides can rise sharply for a while, which skews the measurement.
How quickly do triglycerides drop?
They respond relatively quickly to lifestyle. Within 2 to 4 weeks you often already see a fall, especially if you limit sugar and alcohol.
Are high triglycerides dangerous?
A mildly raised value is mainly a signal to review your lifestyle and your whole lipid profile. Only at very high values, above 5.6 mmol/L, does the risk of pancreatitis rise. Discuss such a result with your doctor.
Want to map your triglycerides alongside your cholesterol? You can do that with a lipid profile. A raised value can point to increased risk, but is not a diagnosis. At Vitalcheck, every blood test result includes a professional assessment by a BIG-registered doctor. Always discuss treatment decisions with your GP.
Sources
- Hartstichting (Dutch Heart Foundation). Cholesterol and triglycerides. Accessed 2026.
- Voedingscentrum (Netherlands Nutrition Centre). Sugar, fat and cardiovascular disease. Accessed 2026.
Frequently asked questions
What is a normal triglyceride level?
When fasting, a triglyceride level below 1.7 mmol/L is usually considered normal. Between 1.7 and 2.3 mmol/L is called mildly raised. Compare your result with the reference ranges on your lab report.
What does a high triglyceride level mean?
Raised triglycerides can be linked to excess weight, alcohol, a lot of sugar or little exercise, and sometimes to another cause. Discuss strongly raised values with your doctor.
How can you lower triglycerides?
Less sugar and alcohol, more exercise and weight loss can help lower triglycerides. Oily fish and fibre often fit such an approach. Check with your doctor what makes sense in your situation.
Do you need to fast before a triglyceride test?
A reliable triglyceride measurement often asks for 9 to 12 hours of fasting. Follow the instruction you get from your doctor or the lab.
Author
