Key Takeaways

Omega-3s from fish oil can stay in your system for several days to weeks.

Fish oil is best known for its anti-inflammatory effects, which may help support heart, brain, joint, and eye health.

Avoid taking fish oil supplements if you have a fish or shellfish allergy or are scheduled for surgery. Talk to a healthcare provider before taking fish oil.

Fish oil can remain in your body for several days to weeks, depending on factors such as dose, frequency, and metabolism.

Factors That Influence How Long It Stays in Your System

1. Half-Life

A half-life is the time it takes for the amount of a substance in your body to decrease by half. The half-life of fish oil's main components, omega-3 fatty acids EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), are 37 hours and

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