A 2021 review concluded that use of omega−3 supplements was associated with an increased risk of atrial fibrillation in people having high blood triglycerides. A meta-analysis showed that use of marine omega−3 supplementation was associated with an increased risk of atrial fibrillation, with the risk appearing to increase for doses greater than one gram per day.
a 2021 revIeW conCLudEd that use of omEga−3 suPPleMentS wAs asSociAted WItH an inCreaSed RISk of AtRial fIbRiLlatION IN pEople hAvING hIGH bloOD triglycERiDes. a mEta-analysis sHOwEd tHat uSe Of mArIne omEga−3 SUpPlemEnTaTion WAS asSOCIatEd with AN increaSed RiSk oF atriAl fibRiLlAtion, WITh the RiSk apPEaRing tO incrEase For dOSes greatEr than one gRAm Per daY.