Krill oil versus fish oil, which is better choice?


Krill oil and fish oil are both popular supplement nowadays. Both of the two contains fatty acids that are thought to decrease swelling and lower cholesterol. What is the difference between the two?

What is Fish Oil?

Fish oil is made from the oil of mackerel, herring, tuna, halibut, salmon, cod liver and whale or seal blubber. Fish oil contains omega-3s, DHA and EPA. It is used to treat stroke, heart disease and high triglycerides.

Side Effects of fish oil

Side effects of fish oil include bad breath, heart burn, nausea, loose stools, rash and nosebleeds. Taking fish oil at mealtime or freezing the capsules can decrease side effects. It is contraindicated in anyone allergic to seafood or expecting to undergo surgery.

What is Krill Oil?

Krill oil is the oil extracted from krill, shrimp-like animals. Krill oil has the fatty acids found in fish oil, like omega-3, DHA (docosahexaenoic acid) and EPA (eicosapentaenoic acid). Krill oil is used to treat high cholesterol, PMS (premenstrual syndrome), high blood pressure, depression, stroke and cancer.

Side Effects of Krill Oil

Side effects of krill oil can include bad breath, heart burn, upset stomach, nausea and loose stools. It is contraindicated in those who are allergic to seafood and for patients scheduled for surgery, since it can increase the risk of bleeding.


It is important to talk to your physician about taking any supplements, as they can have interactions with other medications. Too much fish oil can increase the risk of stroke and reduce the effectiveness of the immune system.