Purpose Of Review: The Omega-3 Index (O3I) was proposed 20 years ago as not only a marker of body omega-3 fatty acid status, but more importantly, as a risk factor for fatal coronary heart disease. The purpose of this review is to document the continued and growing use of this metric in nutrition research.
Recent Findings: Of the 456 citations to the O3I in PubMed, 58 have appeared in the last 18 months. Several of these articles are reviewed, and they underscore the widespread use of the metric.
Summary: Although the O3I was originally developed in the cardiovascular field, it has since been used in the study of a remarkably large number of health conditions, all of which appear to be favorably impacted by higher levels of tissue omega-3 fatty acids as reflected by the O3I.
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