The most common side effects of krill oil are stomach-related and similar to those of fish oil. These effects include stomach discomfort, decreased appetite, taste change, heartburn, fishy burps, bloating, gas, diarrhea, and nausea.- Taking krill oil by mouth might also cause facial skin to become oilier or to break out.
- Pregnancy and breast-feeding: Not enough is known about the use of krill oil during pregnancy and breast-feeding - avoid use.
- Bleeding disorders: Because krill oil can slow blood clotting, there is concern that it might increase the risk of bleeding in people with bleeding disorders. Until more is known, people with such conditions should use krill oil cautiously.
- Diabetes: Krill oil might lower blood sugar levels in people with diabetes. Watch for signs of low blood sugar (hypoglycemia) and monitor your blood sugar carefully if you have diabetes and use krill oil.
- Obesity: Krill oil might lower how well insulin works in people who are overweight or obese. This might increase the risk of developing diabetes or heart disease.
- Seafood allergy: Some people who are allergic to seafood might also be allergic to krill oil supplements. There is no reliable information showing how likely people with seafood allergy are to have an allergic reaction to krill oil -use it cautiously if you have a seafood allergy or avoid. Surgery:
- Because krill oil can slow blood clotting, there is concern that it might increase the risk of bleeding during and after surgery.