A complete safety, timing, and dosage guide for combining Krill Oil with Fish Oil (Omega-3: EPA / DHA) — including how the two supplements interact, the best time of day to take each, and which populations should be careful.
Yes, you can take fish oil and krill oil together. Both supply EPA and DHA, and krill oil's phospholipid form can complement the higher dose in fish oil.
Fish oil (omega-3: EPA/DHA) and krill oil together provide a complementary mix of omega-3 fatty acids, with fish oil delivering a higher EPA/DHA dose and krill oil adding phospholipid-bound omega-3s and astaxanthin. Combining them is safe for most people and may support cardiovascular and joint health.
Fish oil delivers EPA and DHA mainly as triglycerides or ethyl esters, while krill oil carries these fatty acids attached to phospholipids. The phospholipid structure may help omega-3s incorporate into cell membranes more efficiently, and krill oil also contains astaxanthin, a powerful antioxidant. Both types are digested by lipases and absorbed through the gut with dietary fat, so taking them together simply adds to your total omega-3 intake. Rather than competing for the same transport system, the combination gives you a high-dose EPA/DHA from fish oil along with the unique phospholipid and choline content of krill oil, which can complement each other. Since both omega-3 sources can act on the same anti-inflammatory pathways, combining them can have an additive effect on reducing triglycerides and supporting cell membrane integrity.
To get the most from both, take fish oil and krill oil together with a meal that contains fat, such as lunch or dinner. You do not need to separate them by hours; they absorb along the same pathway. A common approach is to take 1,000-2,000 mg of fish oil (providing 500-1,000 mg EPA/DHA) plus 100-500 mg of krill oil daily. If you forget a dose, just skip it and continue with your next meal; do not double up. For people on blood thinners, have your healthcare provider check your omega-3 index and INR levels regularly.
Fish oil is available as ethyl esters, natural triglycerides, or re-esterified triglycerides, with triglyceride forms generally better absorbed. Krill oil is naturally bound to phospholipids, which may improve digestion and reduce fishy burps. If you choose an ethyl ester fish oil, take it with a fatty meal to improve absorption; krill oil is usually well tolerated even at lower doses.
Fish oil is frequently stacked with CoQ10 and vitamin D for cardiovascular support, and krill oil sometimes appears with astaxanthin in joint and brain health formulas. These two specific supplements are rarely bundled together because they serve similar purposes, but some comprehensive omega-3 blends include small amounts of krill oil to add phospholipids and choline.
Yes, you can take fish oil and krill oil together in the same meal. The fats do not interfere with each other’s absorption, and taking them together makes it easier to reach your daily omega-3 target.
It is safe for most healthy adults to take fish oil and krill oil daily, as long as your total EPA/DHA dose stays below 3,000 mg. I recommend checking with your dietitian or doctor if you are also eating fatty fish regularly.
You do not need to wait between them. Take both at the same meal, preferably with a source of fat, for best absorption.
No, they do not compete in a harmful way. Both are absorbed as lipids, so they essentially add together, and the phospholipid-bound omega-3s in krill oil may even complement the triglyceride omega-3s in fish oil.
People who are about to have surgery, are on high-dose blood thinners, or have a shellfish allergy should avoid or adjust this combination. I would also be cautious if you have a bleeding disorder or are pregnant and taking high doses.
Take both with food, especially a meal that contains fat, since that improves absorption and reduces the chance of digestive discomfort or fishy burps.
Reviewed by Caroline M. on April 2, 2026 for accuracy against the sources listed above. This page is educational and is not a substitute for professional medical advice.
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