Fish Oil

Does fish oil work?

Overall Effectiveness Rating for Fish Oil

The overall effectiveness rating for fish oil is 2.5 out of 3. This rating means there is ample evidence that using fish oil will lead to positive results.

Overall Confidence Rating for Fish Oil

There are 14 studies in the database on fish oil; the confidence rating is 36. A score above 80 means the effectiveness rating for this supplement is reliable. A score under 80 means there is insufficient evidence to ensure a reliable effectiveness rating. Note, this rating is for fish oil as a whole. There are also individual ratings for the claims below.

Individual Claims

The overall ratings above do no necessarily reflect each claim about fish oil. Individual claims can have higher or lower ratings. For example, some supplements may have a lot of backing for one claim, but be completely useless for another. Click on claims below for more information.

Body Composition (weight, muscle, body fat) Claims Effectiveness Rating Confidence Rating
decrease body fat
increase fat burning

Performance Claims Effectiveness Rating Confidence Rating
improve cycling performance
improve sports performance
decrease fatigue

Cardiovascular Health Claims Effectiveness Rating Confidence Rating
lower blood pressure
lower LDL (bad) cholesterol levels
increase HDL (good) cholesterol levels
lower total cholesterol levels
lower triglyceride levels
improve heart rate variability

Recovery Claims Effectiveness Rating Confidence Rating
improve recovery
reduce muscle damage
reduce muscle soreness

References

Title of Study
a-Linolenic acid and marine long-chain n-3 fatty acids differ only slightly in their effects on hemostatic factors in healthy subjects13
Adding omega-3 fatty acids to a protein-based supplement during pre-season training results in reduced muscle soreness and the better maintenance of explosive power in professional Rugby Union players
Combining fish-oil supplements with regular aerobic exercise improves body composition and cardiovascular disease risk factors
DHA-rich Fish Oil Increases the Omega-3 Index and Lowers the Oxygen Cost of Physiologically Stressful Cycling in Trained Individuals
Docosahexaenoic acid-rich fish oil improves heart rate variability and heart rate responses to exercise in overweight adults
Effect of eicosapentaenoic acids-rich fish oil supplementation on motor nerve function after eccentric contractions
Effect of supplementation with flaxseed oil and different doses of fish oil for 2 weeks on plasma phosphatidylcholine fatty acids in young women
Eicosapentaenoic acid and docosahexaenoic acid from fish oils: differential associations with lipid responses
Eicosapentaenoic and docosahexaenoic acids-rich fish oil supplementation attenuates strength loss and limited joint range of motion after eccentric contractions: a randomized, double-blind, placebo-controlled, parallel-group trial
Fish oil in combination with high or low intakes of linoleic acid lowers plasma triacylglycerols but does not affect other cardiovascular risk markers in healthy men
Fish Oil Reduces Heart Rate and Oxygen Consumption During Exercise
Fish oil supplementation does not alter energy efficiency in healthy males
Moderate consumption of fatty fish reduces diastolic blood pressure in overweight and obese European young adults during energy restriction
The Effect of Omega-3 Fatty Acid Supplementation on the Inflammatory Response to eccentric strength exercise