Subject area	Nutrition
More specific subject area	Dietary supplementation in adults with type 1 and type 2 diabetes
Type of data	Table and text file
How data were acquired	Web-based questionnaire
Data format	Raw, analyzed
Experimental factors	The criteria used for including patients in the study and how data were collected has been described in Ewers et al.[1]
Experimental features	Data were analyzed by using SPSS software for Windows, version 22.0 (IBM Corp, Armonk, NY, USA)
Data source location	Copenhagen area, Denmark
Data accessibility	The data are with this article
Related research article	B. Ewers, E. Trolle, S.S. Jacobsen, D. Vististen, T.P. Almdal, T. Vilsbøll, et al. Dietary habits and adherence to dietary recommendations in patients with type 1 and type 2 diabetes compared with the general population in Denmark. Nutrition 2018 (in press) [1].