A triglyceride level of 64 mg/dL falls comfortably in what most clinical guidelines consider the optimal range, well below the 150 mg/dL threshold that marks the upper boundary of “normal.” In fact, research suggests that cardiovascular risk continues to drop at triglyceride levels far below that cutoff, which means 64 is not just acceptable but genuinely favorable. That said, the number on its own tells you less than you might think, and a few wrinkles in the evidence are worth knowing about.
Where 64 Lands on the Standard Scale
Most labs and guidelines break triglyceride levels into four tiers: normal (under 150 mg/dL), borderline high (150 to 199), high (200 to 499), and very high (500 and above). Some professional bodies have added a more granular “optimal” category, usually defined as below 100 mg/dL. By either framework, 64 mg/dL sits in the best possible bracket. A large body of evidence supports the idea that the relationship between triglycerides and heart disease risk does not simply flatten out once you drop below 150. One long-term study found that people with triglycerides well below the conventional cutoff had lower rates of cardiovascular disease than those who merely cleared it, reinforcing the notion that lower is generally better in this range.1Journal of Clinical Lipidology. Long-term triglyceride levels and risk of atherosclerotic cardiovascular disease
Still, a single triglyceride reading is a snapshot, not a portrait. Triglyceride concentrations swing more than most other lipid markers depending on when you last ate, what you ate, how recently you exercised, and even the time of day. A reading of 64 today might be 85 or 50 tomorrow under slightly different circumstances. If you got this result from a standard fasting lipid panel, it is reasonably stable and representative. If you were not fasting, the number could actually be slightly higher than your true baseline, since a recent meal typically nudges triglycerides upward.
Cardiovascular Benefits of Low Triglycerides
The heart-health picture at a level like 64 is encouraging. Triglycerides travel through your bloodstream packaged inside lipoproteins, and when these particles linger because the body cannot clear them fast enough, they contribute to the buildup of plaque in artery walls. At low triglyceride concentrations, this backlog is minimal. One large study of patients with heart failure found a clear positive relationship between high triglyceride levels and death or hospitalization from atherosclerotic cardiovascular disease, while intermediate levels carried lower risk.2Nature Communications. Triglyceride levels and its association with all-cause mortality and cardiovascular outcomes among patients with heart failure People at 64 mg/dL are on the favorable end of that spectrum.
The combination of low triglycerides with high HDL cholesterol appears to be especially protective. In a study examining ischemic heart disease risk, the group with low triglycerides and high HDL had markedly lower odds of developing heart disease, while the opposite profile, high triglycerides paired with low HDL, was associated with roughly 70 percent greater odds after adjusting for other risk factors.3JAMA Internal Medicine. Low Triglycerides–High High-Density Lipoprotein Cholesterol and Risk of Ischemic Heart Disease If your triglycerides are 64 and your HDL is solid, that pairing is working in your favor.
The Triglyceride-to-HDL Ratio
Your triglyceride number becomes even more informative when you look at it relative to your HDL cholesterol. The triglyceride-to-HDL ratio has gained attention as a simple proxy for insulin resistance, a metabolic state where the body’s cells respond poorly to insulin and that often precedes type 2 diabetes. A study of White European and South Asian men and women found that the ratio was a reasonably good detector of insulin resistance, with optimal cutpoints for flagging it falling between roughly 2.0 and 3.8 in mg/dL terms.4PLoS ONE. The Association of the Triglyceride-to-HDL Cholesterol Ratio with Insulin Resistance in White European and South Asian Men and Women
If your triglycerides are 64 and your HDL is, say, 55, your ratio is about 1.2, well below the zone where insulin resistance becomes likely. That is a reassuring metabolic signal. The ratio is not a perfect tool and performs somewhat differently across ethnic groups, but at levels this low it generally points toward healthy insulin sensitivity.
Can Triglycerides Be Too Low?
This is the question people with very low readings often land on, and the honest answer is: in rare situations, yes, though 64 mg/dL is not in that territory. Extremely low triglycerides, usually below about 40 mg/dL, have shown up in a few studies as a risk marker for certain conditions. The most notable link is with hemorrhagic stroke, a type of stroke caused by bleeding rather than a clot. A large study of women found that those in the lowest quartile of triglycerides had roughly double the risk of hemorrhagic stroke compared to women in the highest quartile.5Neurology. Lipid levels and the risk of hemorrhagic stroke among women A pooled prospective study similarly found that triglycerides were inversely related to intracerebral hemorrhage, meaning lower levels were associated with higher incidence of that particular type of bleeding event.6PubMed. Risk factors for intracerebral hemorrhage in a pooled prospective study
Before that alarms you, some context. Hemorrhagic stroke is far less common than the ischemic kind, and the absolute risk increase at low triglyceride levels is small. Furthermore, another study of patients who had already suffered a spontaneous brain hemorrhage found that lower triglycerides at admission predicted worse long-term outcomes, but this was in a clinical population already in crisis, not in the general population walking around with a fasting level of 64.7PubMed. Low Triglyceride Levels are Associated with Unfavorable Outcomes in Patients with Spontaneous Intracerebral Hemorrhage For most people, 64 is nowhere near the danger zone. These findings are more relevant for people whose triglycerides persistently sit below 30 or 40, which can sometimes signal malnutrition, malabsorption, or an overactive thyroid gland.
What Makes Triglycerides Rise or Fall
Understanding why your level landed at 64 can help you keep it there, or at least not worry if it drifts a bit in either direction.
Diet
What you eat has a surprisingly large and fast impact on triglycerides. Diets high in refined carbohydrates tend to push triglycerides up because the liver converts excess carbohydrate energy into fat packaged as triglyceride-rich particles. A metabolic study showed that when participants switched to a low-fat, high-carbohydrate diet, every single person experienced a significant rise in fasting triglycerides, accompanied by a drop in both LDL and HDL cholesterol.8JCI Insight. Effects of a low-fat, high-carbohydrate diet on VLDL-triglyceride assembly, production, and clearance In other words, swapping fat for carbs does not always improve your lipid profile across the board.
On the flip side, low-carbohydrate diets tend to lower triglycerides. A meta-analysis of randomized trials found that low-carb diets reduced triglycerides by a meaningful margin, with a somewhat larger effect in the first six months than over longer periods.9PubMed Central. The effects of low-carbohydrate diets on cardiovascular risk factors: A meta-analysis Alcohol is another potent driver. Even moderate drinking can elevate triglycerides, and heavy drinking is one of the most common causes of very high levels. If your triglycerides are 64 and you eat a varied diet without much added sugar or heavy alcohol intake, that pattern is likely part of the explanation.
Exercise
Physical activity is one of the most effective ways to keep triglycerides low, and the mechanism is interesting. When you exercise, your muscles dramatically increase production of an enzyme called lipoprotein lipase, which sits on the inner surface of blood vessels and pulls triglycerides out of circulating lipoproteins so muscles can burn the fatty acids for fuel. One study found that this enzyme increased by 170 to 240 percent in skeletal muscle within about a day after exercise.10PubMed. Exercise induces lipoprotein lipase and GLUT-4 protein in muscle independent of adrenergic-receptor signaling In trained athletes, this clearing machinery is upregulated even in the fasting state, meaning their bodies are constantly better at sweeping triglycerides out of the blood.11PubMed. Obesity versus endurance exercise training: plasma triacylglycerol and muscle lipoprotein lipase activity at the crossroads of lipid accumulation in muscle If you are regularly active, that alone could explain a reading of 64.
Genetics
Some people are genetically wired for low triglycerides, and the consequences appear to be overwhelmingly positive. A large study of over 110,000 participants identified people who carried loss-of-function mutations in a gene called APOC3. These carriers had naturally lower triglycerides and a 40 percent lower risk of coronary heart disease compared to non-carriers.12PubMed Central. Loss-of-Function Mutations in APOC3, Triglycerides, and Coronary Disease A separate study found that people with loss-of-function variants in another gene, ANGPTL3, had triglyceride levels about 27 percent lower than average and roughly 41 percent lower odds of coronary artery disease.13PubMed Central. Genetic and Pharmacologic Inactivation of ANGPTL3 and Cardiovascular Disease These genetic findings are powerful because they act as natural experiments. People who carry these variants have lived their entire lives with lower triglycerides, and they develop less heart disease. That pattern strongly suggests the low triglycerides themselves are part of the protection, not just a bystander marker.
Thyroid Function and Other Medical Causes
While a triglyceride level of 64 usually reflects good health, very low triglycerides can sometimes be a downstream sign of another condition. An overactive thyroid gland, for instance, speeds up metabolism broadly, including fat metabolism, pulling triglyceride levels below where they would otherwise sit. A study comparing lipid profiles in people with thyroid disorders found that patients with hyperthyroidism had significantly lower triglycerides, total cholesterol, and LDL cholesterol than healthy controls. On the other hand, patients with an underactive thyroid had significantly higher triglycerides and cholesterol across the board.14PubMed Central. A comparative study on serum lipid levels in patients with thyroid dysfunction: a single-center experience in Ethiopia
If your triglycerides are 64, your doctor is unlikely to suspect a thyroid problem unless you also have symptoms like unexplained weight loss, rapid heartbeat, or anxiety. But if those symptoms are present and your triglycerides are unexpectedly low, thyroid testing is a reasonable step. Malabsorption disorders and severe caloric restriction can also push triglycerides unusually low, though again, 64 is not in the range where these explanations are typically needed.
Fasting Versus Non-Fasting Readings
Whether your blood was drawn fasting or after a meal matters more for triglycerides than for almost any other lipid marker. Most lipid concentrations barely budge after eating, changing less than 5 percent. Triglycerides are the exception; they can spike meaningfully after a meal as your gut absorbs dietary fat and packages it into lipoproteins for transport.15PubMed Central. Fasting compared with nonfasting lipids and apolipoproteins for predicting incident cardiovascular events
Here is where it gets interesting. A large study of women found that fasting triglyceride levels lost their predictive power for cardiovascular events once other risk factors like diabetes and body weight were accounted for. Non-fasting triglycerides, by contrast, maintained a strong and independent association with cardiovascular events even after full adjustment, with women in the highest tertile of non-fasting levels having roughly double the risk of those in the lowest.16JAMA. Fasting Compared With Nonfasting Triglycerides and Risk of Cardiovascular Events in Women This suggests that how your body handles triglycerides after a meal may matter more than the quiet fasting number. If your fasting level is 64, your post-meal clearance is almost certainly efficient too, but it is a useful reminder that the fasting result is just one piece of the metabolic picture.
What Happens When Triglycerides Are High Instead
Since your number is low, it helps to understand what elevated triglycerides actually do to the body, both to appreciate your favorable position and because levels can change over the years. When triglycerides are high, the liver pumps out more triglyceride-rich lipoproteins, and the body’s clearing system cannot keep pace. The result is a buildup of so-called remnant particles in the bloodstream.17PubMed Central. Triglyceride-Rich Lipoproteins and Remnant Cholesterol in Cardiovascular Disease These remnants are small enough to slip into artery walls, where they deposit cholesterol and promote inflammation. This remnant cholesterol pathway is now considered a major contributor to atherosclerosis independent of LDL cholesterol.
For people who do need to bring elevated triglycerides down, the first-line approach is lifestyle change, specifically diet and exercise. When those are not enough, medications enter the picture. Omega-3 fatty acid supplements at prescription doses can lower triglycerides meaningfully, whether used alone or added to a statin.18PubMed Central. The effect of omega-3 fatty acids and its combination with statins on lipid profile in patients with hypertriglyceridemia: A systematic review and meta-analysis of randomized controlled trials An American Heart Association advisory confirmed that both EPA-plus-DHA and EPA-only formulations appear roughly comparable at reducing triglycerides without raising LDL cholesterol.19PubMed. Omega-3 Fatty Acids for the Management of Hypertriglyceridemia: A Science Advisory From the American Heart Association Fibrates are another class of triglyceride-lowering drugs, though their track record for actually preventing heart attacks has been less consistent than their ability to improve lab numbers.20PubMed. Long-chain omega-3 fatty acids, fibrates and niacin as therapeutic options in the treatment of hypertriglyceridemia: a review of the literature None of this is relevant at a level of 64, but it is worth filing away for the future or for family members who may need it.
How Age and Sex Shift the Baseline
Triglyceride levels are not static across a lifetime. They tend to be relatively high in infancy, dip during school age, rise through adolescence, and generally climb in adulthood, peaking for men around age 40 to 49. Women typically run lower than men until menopause, after which the gap narrows or reverses as hormonal shifts change lipid metabolism.21Pro Research Analysis. Triglycerides normal range by age A reading of 64 at age 25 is common and unremarkable. The same reading at age 55 in a man is genuinely excellent and suggests either favorable genetics, a very active lifestyle, or both.
In children and adolescents, the definition of “normal” differs from adults. A German population-based study found that the prevalence of elevated triglycerides in children under 10 was around 22 percent using pediatric cutoffs, dropping to about 12 percent in the 10-to-16 age range, reflecting the natural dip and rise in triglycerides during childhood.22ScienceDirect. Clinical Pediatric reference data of serum lipids and prevalence of dyslipidemia: Results from a population-based cohort in Germany If a child or teenager has a triglyceride reading of 64, that is firmly in the healthy zone for their age group as well.
Genetic Drugs on the Horizon
The discovery that natural mutations in genes like APOC3 and ANGPTL3 lead to lifelong low triglycerides and protection from heart disease has sparked a wave of drug development. Pharmaceutical companies are now designing therapies that mimic what these genetic variants do naturally, essentially silencing these genes in people who do not carry the lucky mutations. Several of these drugs are already in advanced clinical trials or have received regulatory approval for severe hypertriglyceridemia.
The ANGPTL3 pathway is especially active as a drug target. The large genetic study that found carriers of ANGPTL3 loss-of-function variants had about 27 percent lower triglycerides and 41 percent lower odds of coronary disease helped validate a monoclonal antibody designed to block the same protein.23PubMed Central. Genetic and Pharmacologic Inactivation of ANGPTL3 and Cardiovascular Disease Similarly, the APOC3 findings spurred development of antisense therapies that reduce production of the APOC3 protein, lowering triglycerides in patients whose levels are dangerously high due to genetic or metabolic causes.24PubMed Central. Loss-of-Function Mutations in APOC3, Triglycerides, and Coronary Disease These treatments are designed for people at the opposite end of the triglyceride spectrum from someone with a reading of 64, but they illustrate how seriously the field now takes triglyceride reduction as a strategy for preventing heart disease. For decades, LDL cholesterol dominated the conversation. Triglycerides are finally getting their due.