MCT oil does not reliably lower triglycerides. Despite its popularity in wellness circles and its unique metabolism in the body, clinical trials consistently show no statistically significant reduction in blood triglyceride levels from MCT oil supplementation. The good news is that it doesn’t appear to raise them either, making it a relatively neutral fat for heart health.
What the Clinical Evidence Shows
Multiple controlled studies have tested MCT oil’s effect on blood lipids, and the results are consistent. In a 16-week trial comparing MCT oil to olive oil as part of a weight loss diet, neither oil produced a significant change in fasting triglycerides. The MCT group’s triglycerides dropped from 0.84 to 0.77 mmol/L, while the olive oil group went from 1.18 to 0.98 mmol/L, but neither shift reached statistical significance. The researchers concluded that MCT oil performs comparably to olive oil for cardiovascular risk factors and can be considered a “neutral dietary fat.”
A separate 12-week study examining MCT oil and butter added to coffee found no difference in triglyceride levels between the intervention group and the control group. A meta-analysis of randomized controlled trials looking at MCT oil for weight loss confirmed the same pattern: no changes in triglycerides, total cholesterol, LDL, or HDL when MCT replaced other dietary fats. Even at doses up to three tablespoons per day (about 42 grams), MCT oil produced no statistically significant change in any lipid marker.
Why People Assume It Should Work
The idea that MCT oil lowers triglycerides comes from how it’s digested. Regular dietary fats (long-chain triglycerides) get broken down in your gut, reassembled into fat particles, and shipped through the lymphatic system before eventually reaching your liver. This process contributes to circulating triglyceride levels and allows fat to be stored in adipose tissue.
Medium-chain fatty acids skip that entire route. Because they have shorter carbon chains and are more water-soluble, they travel directly to the liver through the portal vein after digestion. Once there, they’re rapidly burned for energy through a process called beta-oxidation rather than being repackaged into the triglyceride-rich particles that show up on a blood test. In theory, this should mean less triglyceride production. In practice, the effect simply isn’t large enough to move the needle on a standard lipid panel.
MCT Oil and Overall Cholesterol
If you’re taking MCT oil and worried about your broader lipid profile, the evidence is reassuring. The 12-week study of MCT oil in coffee found no increase in LDL cholesterol and no increase in apolipoprotein B, a protein marker that tracks closely with heart disease risk. HDL cholesterol also stayed stable. These findings held despite participants increasing their overall saturated fat intake for the full 12 weeks.
The meta-analysis of randomized trials reached the same conclusion: replacing other fats with MCT in the diet did not adversely affect lipid profiles. So while MCT oil won’t improve your cholesterol numbers, it’s unlikely to worsen them either.
The Weight Loss Connection
Where MCT oil may offer an indirect benefit to triglycerides is through body composition. The same meta-analysis found that replacing long-chain fats with MCTs led to modest reductions in body weight, total body fat, and visceral fat (the deep abdominal fat linked to metabolic problems). MCTs appear to increase energy expenditure and fat burning compared to other dietary fats, which over time can contribute to a negative energy balance.
This matters because excess body fat, particularly visceral fat, is one of the strongest drivers of elevated triglycerides. Losing weight through any method tends to bring triglyceride levels down. So if MCT oil helps you manage your weight as part of a broader dietary strategy, your triglycerides may improve as a downstream effect. But the oil itself isn’t doing the triglyceride-lowering work directly.
Where MCTs Fit in Lipid Management
The American Heart Association has mentioned MCTs in one narrow context: for people with very high triglyceride levels or a history of triglyceride-induced pancreatitis. In that situation, MCTs are listed as a “possible” dietary tool, likely because replacing regular fats with MCTs means fewer long-chain fats entering the lymphatic system and contributing to dangerously elevated triglyceride levels. This is a specific clinical scenario, not a general recommendation for people trying to bring moderately high triglycerides into a healthy range.
For most people, the proven lifestyle strategies for lowering triglycerides remain reducing added sugars and refined carbohydrates, limiting alcohol, increasing physical activity, and losing excess weight. MCT oil can be part of your diet without causing harm to your lipid profile, but it shouldn’t be the tool you rely on to bring your triglyceride numbers down.
Practical Considerations
If you decide to use MCT oil for other reasons (energy, appetite management, or as a cooking fat), start with a low dose. Clinical trials have used up to three tablespoons daily, but many participants found that amount difficult to tolerate due to gastrointestinal side effects like cramping and diarrhea. The average tolerated dose in one trial was closer to 1.8 tablespoons per day, or about 25 grams. Starting with one teaspoon and gradually increasing over a week or two gives your digestive system time to adjust.
Each tablespoon of MCT oil contains roughly 115 calories. Because it doesn’t appear to have a direct effect on blood lipids, adding it on top of your regular fat intake, rather than replacing other fats, simply adds calories without a cardiovascular benefit.