Omega-3 from dietary supplements may be more beneficial to a healthy diet than omega-3 sourced from conventional plant foods, according to a new meta-analysis published in July by the Public Library of Science Genetics.

Across five population-based categories, representing more than 8,800 subjects, researchers found a lower conversion rate from plant omega-3 (abbreviated ALA) to EPA and DHA. We get Omega-3 EPA and DHA directly from omega-3 supplements or through metabolic conversion from ALA found mostly in seeds and plants. The study found that the higher ratio of ALA in the body corresponded to lower levels of EPA and DHA, suggesting an inefficiency in conversion of ALA to EPA/DHA.

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