**5. Conclusions**

Despite the similarities between the behaviors of healthy people and those with T1DM, undesirable nutritional and health habits were observed during the second wave of the COVID-19 pandemic in both groups. The nutritional patterns of those groups were moderately consistent with the MD. Therefore, it is advisable to promote nutritional and health education in order to increase the awareness of the issue among healthy individuals and those with chronic diseases such as DM. The impact of the aforementioned interventions, with particular emphasis on the above results, would have a positive impact on behavior change, but also on improving treatment results. In the times of the COVID-19 pandemic, new guidelines should be developed based on, for example, the MD pyramid combined with local products.

**Supplementary Materials:** The following are available online at https://www.mdpi.com/article/ 10.3390/nu13041173/s1, Table S1. Health behaviors depending on the age group; Table S2. Health behaviors depending on the place of residence.

**Author Contributions:** Conceptualization, M.G., A.P.-J. and R.M.-Z.; formal analysis, M.G.; investi- ˙ gation, M.G. and A.P.-J.; methodology, M.G., A.P.-J. and R.M.-Z.; project administration, A.M. and ˙ P.N.; supervision, R.M.-Z. and K.S.; validation, J.B.; visualization, M.G.; writing—original draft, M.G., ˙ A.P.-J. and R.M.-Z.; writing—review and editing, M.G. and A.P.-J. All authors have read and agreed ˙ to the published version of the manuscript.

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

**Institutional Review Board Statement:** The study was conducted according to the guidelines of the Declaration of Helsinki and approved by the Ethics Committee of the Medical University of Bialystok (R-I-002/587/2019).

**Informed Consent Statement:** Informed consent was obtained from all subjects involved in the study.

**Data Availability Statement:** The datasets generated and analyzed during the current study are available from the corresponding author on reasonable request.

**Acknowledgments:** The authors thank the participants of the study.

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