Funding for this research was provided by:
World Health Organization (HQNHD1612458, HQNHD1612458, HQNHD1612458)
Received: 10 October 2019
Revised: 27 January 2020
Accepted: 5 February 2020
First Online: 29 February 2020
Ethics approval and consent to participate
: No ethical approval was required as this was a systematic review and did not use primary data.
: Not applicable.
: The dataset for this review was part of our published dataset, and so is publicly available, see ref. <sup>39</sup>
: S.H., G.T., A.S.A. and L.H. had financial support via the University of East Anglia from the World Health Organization for the submitted work, and L.H. and A.A. were also funded to attend WHO meetings and present review results; no financial relationships with any organisations that might have an interest in the submitted work in the previous three years; no other relationships or activities that could appear to have influenced the submitted work.
: The set of reviews was commissioned and funded by the World Health Organization (WHO) Nutrition Guidance Expert Advisory Group (NUGAG) Subgroup on Diet and Health, in order to inform their guidance on polyunsaturated fatty acid intake (project number HQNHD1612458). They requested specific inclusion criteria (including duration of trials and outcomes), some sensitivity analyses and subgroups. The results of the reviews, including GRADE assessments, were discussed and reviewed by the WHO NUGAG Subgroup on Diet and Health as part of WHO’s guideline development process. WHO was not otherwise involved in writing this report.