Several supplements can meaningfully lower triglycerides, with omega-3 fatty acids and berberine having the strongest clinical evidence behind them. The size of the effect varies widely depending on which supplement you choose, the dose, and how elevated your triglycerides are to begin with. Here’s what the research actually supports, what’s overhyped, and what to know before you start.
Omega-3 Fatty Acids: The Strongest Evidence
Omega-3s, specifically EPA and DHA from fish oil, are the most studied supplement for triglyceride reduction. At a dose of 4 grams per day, EPA and DHA can reduce triglycerides by 30% or more. That’s a substantial drop, comparable to some prescription medications. The American Heart Association recognizes this dose as effective for managing very high triglycerides (500 mg/dL and above).
There’s an important catch, though. Supplements that combine EPA and DHA tend to raise LDL cholesterol (the “bad” kind) at the same time they lower triglycerides. EPA-only formulations don’t appear to cause this trade-off, which is one reason prescription EPA products exist. If your LDL is already borderline or high, this distinction matters.
Getting 4 grams of actual EPA and DHA from over-the-counter fish oil is harder than it sounds. Most standard fish oil capsules contain only 300 to 500 mg of combined EPA and DHA per capsule, meaning you’d need 8 to 13 capsules a day to hit the therapeutic dose. Concentrated fish oil products get you there with fewer pills, but quality is a real concern. A study of fish oil supplements sold in New Zealand found that only 3 out of 32 products contained EPA and DHA levels matching their labels. The majority had less than 67% of what they claimed. Prescription omega-3 products are held to strict FDA purity standards, while over-the-counter supplements are not. OTC products may contain contaminants, saturated fats, cholesterol, and oxidation byproducts that prescription versions don’t.
If you go the supplement route, look for third-party tested products and check the “Supplement Facts” panel for the actual EPA and DHA content per serving, not just the total fish oil amount. Side effects at high doses are generally mild: digestive discomfort, fishy aftertaste, and occasional nausea. The more significant risk is increased bleeding tendency, especially if you take blood thinners or antiplatelet medications.
Berberine: A Strong Plant-Based Option
Berberine is a compound found in several plants, including goldenseal and barberry. It’s emerged as one of the more promising natural alternatives for lipid management, and the triglyceride data is genuinely impressive. In a clinical trial of 32 patients taking 500 mg twice daily for three months, triglycerides dropped by 35%. Total cholesterol fell by 29%, and LDL dropped by 25%.
A randomized, placebo-controlled trial in people with diabetes and abnormal lipids found even more striking results. Triglycerides fell from an average of 97 mg/dL to 62 mg/dL after three months of berberine at 500 mg twice daily, a 36% reduction. The placebo group saw no change. Across multiple clinical trials, triglyceride reductions typically ranged from 25 to 55 mg/dL.
The standard dose used in nearly all clinical trials is 500 mg taken once or twice daily. Berberine can interact with several medications, particularly those processed by the liver, and it may lower blood sugar. If you’re on diabetes medication, that stacking effect could push your blood sugar too low. Digestive side effects like cramping and diarrhea are the most common complaints.
Curcumin: Modest but Consistent Effects
Curcumin, the active compound in turmeric, has a smaller effect on triglycerides than omega-3s or berberine, but the evidence is consistent. A large umbrella review pooling data from 87 randomized controlled trial arms found that curcumin supplementation reduced triglycerides by an average of about 13 mg/dL. That’s a modest drop on its own, but it could be meaningful as part of a broader approach.
The effect was significant across all forms of curcumin tested, including whole turmeric compounds, curcumin extracts, and bioavailability-enhanced formulas. Supplementation for at least 8 weeks showed the clearest benefit. Dosages in studies ranged widely, from 500 to 6,000 mg per day for standard extracts. Because curcumin is poorly absorbed on its own, formulations that pair it with piperine (from black pepper) or use nano or liposomal delivery systems tend to perform better. Bioavailability-enhanced products used much lower doses, sometimes as little as 80 to 250 mg per day, and still showed effects.
Niacin: Effective but Comes With Trade-Offs
Niacin (vitamin B3) lowers triglycerides through multiple pathways. It slows the liver’s production of triglycerides, speeds the breakdown of particles that carry them through the blood, and reduces the release of fatty acids from fat tissue. The therapeutic dose for triglyceride reduction ranges from 1,500 to 3,000 mg per day, far above the small amounts found in a multivitamin.
At these doses, niacin is more like a medication than a typical supplement. The most common side effect is intense skin flushing, a hot, red, itchy sensation that can be uncomfortable enough to make people quit. Starting at a low dose (250 mg at bedtime) and gradually increasing over weeks can help your body adjust. More seriously, high-dose niacin carries a risk of liver injury, which is why periodic monitoring with blood work is standard practice when it’s used therapeutically. The extended-release form reduces flushing but may increase liver risk compared to immediate-release niacin. This is one supplement you shouldn’t dose on your own without guidance.
Psyllium Fiber: Better for Cholesterol Than Triglycerides
Psyllium husk, a soluble fiber supplement, is well known for lowering LDL cholesterol and total cholesterol. Its effect on triglycerides, however, is much less convincing. A systematic review and meta-analysis of randomized controlled trials found that psyllium produced a nonsignificant reduction in triglycerides overall, averaging about 5 mg/dL. That’s a small enough change that it could easily be due to chance.
Interestingly, there was a signal that doses under 10 grams per day taken for shorter durations (less than 50 days) showed a statistically significant triglyceride reduction, but the overall trend across all doses and durations wasn’t reliable. If you’re already taking psyllium for cholesterol or digestive health, the potential triglyceride benefit is a bonus. But it’s not worth adding specifically for triglycerides when better options exist.
Garlic Extract: Limited Triglyceride Evidence
Aged garlic extract is frequently marketed for heart health, but the triglyceride evidence is thin. In a randomized, double-blind, placebo-controlled trial using 250 mg of aged garlic extract daily for six weeks, triglycerides showed a small decline from baseline in the garlic group. However, when compared directly against the placebo group, the difference was not statistically significant. The study’s primary finding was a modest reduction in blood pressure, not lipid improvement. Garlic extract may have cardiovascular benefits through other mechanisms, but it’s not a reliable tool for lowering triglycerides specifically.
How to Combine Supplements Effectively
Because these supplements work through different mechanisms, combining two or three of the better-supported options can make sense. Omega-3s reduce triglyceride production and speed their clearance from the blood. Berberine works partly by influencing how the liver handles fat-carrying particles. Curcumin appears to act through anti-inflammatory and metabolic pathways. Using them together could produce a larger cumulative effect than any single supplement alone.
That said, more supplements also means more potential for side effects and interactions. Omega-3s and berberine can both thin the blood to some degree, and berberine interacts with a long list of medications. If you’re taking statins, blood pressure drugs, blood thinners, or diabetes medications, check for interactions before stacking supplements. The most practical starting point for most people is high-dose omega-3s (targeting 3 to 4 grams of EPA and DHA daily) or berberine (500 mg twice daily), since these have the largest and most consistent effects. Curcumin in a bioavailability-enhanced form can be a reasonable addition for an extra incremental benefit.
Why Supplement Quality Matters
Unlike prescription drugs, dietary supplements in the United States aren’t required to prove their potency or purity before going to market. The omega-3 data makes this problem concrete: most fish oil products tested in independent studies contained significantly less EPA and DHA than their labels promised, and some contained unwanted ingredients like oxidized fats. This quality gap likely applies to other supplements as well. Choosing products that carry a third-party certification from organizations like USP, NSF International, or ConsumerLab gives you better odds of getting what you’re paying for, at the dose that actually matched what worked in clinical trials.