12-week melatonin administration had no effect on diabetes risk markers and fat intake in overweight women night workers.

"Conflict of interest The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. The author(s) declare that they were an editorial board member of Frontiers, at the time of submission. This had no impact on the peer review process and the final decision."

"The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This research was supported by the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) (grant numbers 2014/50457–0, 2018/09704–4, 2019/03624–1, 2019/24327–5); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (grant numbers 150781/2017–2, 144800/2018–7, 118087/2019–3); and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) (grant numbers 88887.356981/2019–00, 88887.150178/2017–00)."