A new system for foods with functional claims (FFC) was implemented in April 2015. The efficacy of FFC must now be proven by systematic review or randomized clinical trials (RCTs). The aim of this study was to establish the scientific reporting quality of RCTs on the efficacy of FFC and to identify areas that require improvement. The reporting quality of 33 RCT papers on 31 FFC that were received between April 1, 2015 and December 31, 2016 were analyzed by two experts with regard to consistency with the 29 Consolidated Standards of Reporting Trials (CONSORT) items. RCTs on FFC reported 13.8 (47.6%) of the CONSORT items, which is similar to those on FOSHU. There were 7 least reported items, including study design. Determining the reporting quality of FFC studies is an important way of identifying items that require improvement in future papers.
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