Triglycerides and HDL: the numbers food moves fastest
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Triglycerides are the number food moves fastest. Alcohol, sugar, extra weight and sitting still push them up, and cutting back brings them down within weeks. HDL works the other way: a low HDL is a warning sign, but drugs that pushed HDL up didn’t prevent heart attacks, so it’s not a number to chase.
What we’d do
If your triglycerides are high, cut alcohol and sweet drinks first, since they move fastest. Walk at least 150 minutes a week, lift twice, and lose 5 to 10% of your weight if you carry extra. Retest in 4 weeks. At 500 or more, see a doctor within days, because the worry is your pancreas. And leave your HDL alone. Move more for its own sake and keep your eye on LDL and non-HDL.
If you remember three things
- Triglycerides report on the last few weeks. LDL reports on the last few years. That’s why triglycerides drop so fast when you change.
- 500 is a doctor visit. From there the risk of pancreatitis rises, and from 1000 it’s high.
- A higher HDL from a pill didn’t help. In trials of tens of thousands of people, raising HDL with drugs didn’t cut heart attacks.
Why people get these two wrong
HDL got the nickname “good cholesterol”, so a higher number sounds like a win and people look for ways to raise it. Triglycerides get less attention, and when they’re high, people often reach for fish oil from the pharmacy.
Both moves miss. The 2026 US guideline says store-bought fish oil isn’t the same thing as the prescription kind, and it recommends against supplements for lowering triglycerides. And three families of drugs pushed HDL up, one of them by 72%, and none of them cut heart attacks.
The weather and the climate
Triglycerides are like the weather. They swing with your last few meals and drinks, and a big dinner can raise them for six hours. LDL is more like the climate. It reflects how your liver is set, and it moves over weeks and months.
That’s good news if your triglycerides are high. Change what you drink and eat this week, and next month’s test can look different.
The lines for triglycerides
| Triglycerides | mmol/L | What it means |
|---|---|---|
| Under 150 fasting, or under 175 after eating | Under 1.7 or 2.0 | Under the guideline’s line |
| 150 to 499 | 1.7 to 5.6 | High. Lifestyle first, and non-HDL becomes the number to watch |
| 500 to 999 | 5.7 to 11.2 | See a doctor within days. Cut alcohol and sweet drinks today |
| 1000 or more | 11.3 or more | See a doctor the same week. The risk of pancreatitis is high |
Severe pain in your upper belly that spreads to your back, and won’t go away, can be pancreatitis. Go to the emergency room. Very high triglycerides, most often over 1,000, are one of its causes, along with gallstones and heavy drinking.
Why 500? Your body clears triglycerides with an enzyme called lipoprotein lipase. Somewhere around 500 to 700 mg/dL, the guideline explains, the enzyme can’t keep up, and huge fat-carrying particles from your gut pile up in your blood. That’s when the pancreas gets into trouble.
What lowers triglycerides, sized
| Change | Triglycerides | From |
|---|---|---|
| Lose weight | About −1.8 mg/dL per pound (1.3 to 2.4), or 4.0 per kg | The 2026 guideline’s pooled analysis |
| Eat less sugar | About −10 (6 to 13) | 37 trials of higher against lower sugar diets |
| Drink less | About −6 (2.5 to 8.9) for each 2 drinks a day you cut | 42 studies at 30 g of alcohol a day |
| Move | The guideline asks for 150 minutes a week of moderate activity and strength work twice | |
| For scale: a statin | −20 to −40% | The 2026 guideline |
A US drink is 14 g of alcohol: 12 oz of beer, 5 oz of wine or 1.5 oz of spirits. At 500 or more, the guideline says no alcohol at all. If you drink heavily every day, talk to a doctor before you stop, because stopping suddenly can be dangerous. How to lower triglycerides fast puts it all into a four week plan.
High triglycerides often travel with high blood sugar and insulin resistance, and the guideline lists poorly controlled diabetes as a common cause. If yours are high, a glucose check is a sensible next step (glucose.guide).
What a meal does to your test
In 33,391 adults in Copenhagen, a normal meal raised triglycerides by at most about 26 mg/dL (0.3 mmol/L), for up to six hours. LDL and total cholesterol dipped by about 8. That’s why the guideline accepts a test after eating, with a higher line for triglycerides (175 instead of 150). If your triglycerides come back at 400 or more after eating, a fasting retest gives a cleaner LDL.
HDL: why higher isn’t the goal
The warning sign is real. People with low HDL get more heart disease, and in US adults 13.8% have an HDL under 40 mg/dL (1.0 mmol/L), 21.5% of men and 6.6% of women. Low HDL often shows up alongside high triglycerides.
But raising it didn’t help. Scientists tested this three ways.
Genes
Voight and colleagues, Lancet 2012, over 116,000 people
People with a gene variant that raised their HDL from birth had the same heart attack risk as everyone else. From their HDL alone, they should have had 13% fewer.
Genes that raise LDL did raise heart attack risk in the same study, so the method works.
Niacin
AIM-HIGH, 3,414 people, 2011. HPS2-THRIVE, 25,673 people, 2014
Niacin on top of a statin raised HDL (from 35 to 42 mg/dL in AIM-HIGH) and lowered triglycerides. Heart attacks and strokes didn’t fall: 16.4% against 16.2% in one trial, 13.2% against 13.7% in the other.
AIM-HIGH stopped early for lack of benefit.
CETP drugs
Torcetrapib, 15,067 people, 2007
It raised HDL 72%, and deaths went up. A later drug in the same family, dalcetrapib, raised HDL by about a third in 15,871 people and changed nothing.
Torcetrapib also raised systolic blood pressure by about 5 points.
The 2026 guideline says trials don’t support adding niacin or fibrates to a statin to prevent heart attacks and strokes.
Moving is still the best thing for it. Across 25 trials, walking, cycling or swimming raised HDL about 2.5 mg/dL. The smallest dose that moved it was about 120 minutes a week, and each extra 10 minutes per session added about 1.4. Do it for your heart, your blood pressure and your triglycerides, and let HDL follow. Two drinks a day raise HDL about 4 points too, and nobody should drink for that, since alcohol also raises triglycerides and blood pressure.
The fight: why do some doctors still watch HDL?
“Low HDL predicts heart attacks in big studies, so it must be doing something.” It does predict them, and doctors still use HDL in risk calculators like PREVENT. What the gene studies and drug trials show is that pushing the HDL number up, by genes or by drugs, didn’t lower the risk. Non-HDL counts the particles that do get stuck in artery walls, which is why the guideline gives non-HDL a goal and gives HDL none.
12 sources
- Blumenthal RS, Morris PB, Gaudino M and others, 2026 ACC/AHA guideline on the management of dyslipidemia, JACC and Circulation, 2026doi.org
- Rimm EB and others, Moderate alcohol intake and lower risk of coronary heart disease: meta-analysis of effects on lipids and haemostatic factors, BMJ, 1999pubmed.ncbi.nlm.nih.gov
- Te Morenga LA and others, Dietary sugars and cardiometabolic risk: systematic review and meta-analyses of randomized controlled trials, American Journal of Clinical Nutrition, 2014pubmed.ncbi.nlm.nih.gov
- Kodama S and others, Effect of aerobic exercise training on serum levels of high-density lipoprotein cholesterol: a meta-analysis, Archives of Internal Medicine, 2007pubmed.ncbi.nlm.nih.gov
- Langsted A, Freiberg JJ, Nordestgaard BG, Fasting and nonfasting lipid levels, Circulation, 2008pubmed.ncbi.nlm.nih.gov
- Voight BF and others, Plasma HDL cholesterol and risk of myocardial infarction: a mendelian randomisation study, Lancet, 2012pubmed.ncbi.nlm.nih.gov
- AIM-HIGH Investigators, Niacin in patients with low HDL cholesterol levels receiving intensive statin therapy, NEJM, 2011pubmed.ncbi.nlm.nih.gov
- HPS2-THRIVE Collaborative Group, Effects of extended-release niacin with laropiprant in high-risk patients, NEJM, 2014pubmed.ncbi.nlm.nih.gov
- Barter PJ and others, Effects of torcetrapib in patients at high risk for coronary events, NEJM, 2007pubmed.ncbi.nlm.nih.gov
- CDC NCHS Data Brief 515, Total and high-density lipoprotein cholesterol in adults: United States, August 2021 to August 2023cdc.gov
- MedlinePlus, Acute pancreatitis, US National Library of Medicinemedlineplus.gov
- National Institute on Alcohol Abuse and Alcoholism, What is a standard drink?niaaa.nih.gov
