Flaxseed Oil

Does flaxseed oil work?

Overall Effectiveness Rating for Flaxseed Oil

The overall effectiveness rating for flaxseed oil is 1 out of 3. This rating means there is little to no evidence flaxseed oil does what it claims. Using this supplement will not lead to positive results.

Overall Confidence Rating for Flaxseed Oil

There are 3 studies in the database on flaxseed oil; the confidence rating is 28. 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 flaxseed 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 flaxseed 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.

Cardiovascular Health Claims Effectiveness Rating Confidence Rating
lower LDL (bad) cholesterol levels
increase HDL (good) cholesterol levels
lower total cholesterol levels
lower triglyceride levels

General Health Claims Effectiveness Rating Confidence Rating
improve insulin sensitivity


Title of Study
Effect of supplementation with flaxseed oil and different doses of fish oil for 2 weeks on plasma phosphatidylcholine fatty acids in young women
Flaxseed oil supplementation manipulates correlations between serum individual mol % free fatty acid levels and insulin resistance in type 2 diabetics. Insulin resistance and percent remaining pancreatic β-cell function are unaffected
High dose flaxseed oil supplementation may affect fasting blood serum glucose management in human type 2 diabetics