**5. Conclusions**

This meta-analysis indicated that the fish and marine n-3 PUFA intake were inversely associated with reduced risk of CVD mortality. This finding has important public health implications in terms of the prevention of CVD mortality. Since the biomarkers of fish and n-3 PUFA within an individual are important for food absorption, further research needs to be performed in biomarkers.

**Supplementary Materials:** The following are available online at https://www.mdpi.com/article/10 .3390/nu13072342/s1, Figure S1: Sensitivity analysis with respect to fish intake and CVD mortality risk. Figure S2: Funnel plot of the RR of 18 articles on fish intake and CVD mortality risk. Figure S3: Sensitivity analysis with respect to marine n-3 PUFA intake and CVD mortality risk. Figure S4: Funnel plot of the RR of 10 articles on marine n-3 PUFA intake and CVD mortality risk. Table S1: Quality assessment of studies investigating fish intake and CVD mortality risk. Table S2: Quality assessment of studies investigating marine n-3 PUFA intake and CVD mortality risk.

**Author Contributions:** L.J. and A.M. designed research; J.W., K.X., B.Z., L.X. and L.J. conducted research; L.J. analyzed data and wrote the paper. A.M. had primary responsibility for final content. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
