## 5 Conclusions  
The nutritional quality and safety of organic products should be evaluated simultaneously to deliver scientific evidence of the quality of an organic product. The results of this research provide unique knowledge about a product that modern consumers and food producers are interested in.  
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Time and Temperature of Storage** & \multicolumn{3}{c}{**Bar Symbol**} \\ \cline{2-4} **(Month/\({}^{\circ}\)C)** & **B1** & **B2** & **B3** \\ \hline
0 & 0.47 \(\pm\) 0.03 aB & 0.38 \(\pm\) 0.03 aA & 0.48 \(\pm\) 0.02 abB \\
1/4 & 0.59 \(\pm\) 0.03 abC & 0.32 \(\pm\) 0.02 aA & 0.47 \(\pm\) 0.02 aB \\
2/4 & 0.53 \(\pm\) 0.06 abB & 0.36 \(\pm\) 0.03 aA & 0.45 \(\pm\) 0.07 aAB \\
3/4 & 0.63 \(\pm\) 0.05 bAB & 0.75 \(\pm\) 0.06 bB & 0.61 \(\pm\) 0.06 bA \\
1/22 & 0.90 \(\pm\) 0.03 cB & 0.54 \(\pm\) 0.05 abA & 1.01 \(\pm\) 0.05 dB \\
2/22 & 0.81 \(\pm\) 0.03 cB & 0.45 \(\pm\) 0.02 aB & 0.74 \(\pm\) 0.04 cB \\
3/22 & 1.96 \(\pm\) 0.17 dA & 1.33 \(\pm\) 0.41 cA & 1.57 \(\pm\) 0.11 eA \\ \hline \hline \end{tabular}  
* Explanatory notes: data are expressed as mean \(\pm\) SD. Means in the same row within the same column followed by different lowercase letters represent significant differences (_p_ < 0.05). Means in the same row between different columns followed by different capital letters represent significant differences (_p_ < 0.05).  
\end{table}
Table 5: The value of the bar TBARS index (mg MDA/kg).  
Manufactured in industrial conditions, the organic high-protein bars were of good but not the best microbiological quality, with only slight heat treatment as preservation. Nevertheless, based on the presented results it is possible to store the organic high-protein bar for at least 3 months.  
There is the possibility of further modifications to achieve microbial stability at an ambient storage temperature; for example, selecting ingredients that contain fewer microorganisms and/or are rich in antimicrobial compounds. In addition, choosing proper packaging materials and/or storage temperature may improve the safety characteristics of organic high-protein bars.  
It can be concluded that the composition of the organic high-protein bars and their microbiological and physicochemical stability indicate the safety of this innovative product. Among the tested variants, the composition of the B3 bar seemed to be the safest and worth further research, mainly due to the lower frequency of undesirable microorganisms. On the other hand, the protective antioxidative effect of prunes and oat flakes in bars stored at 22 \({}^{\circ}\)C indicates the value of the composition of bar B2.  
Next to standard safety parameters, increasing the safety of HPB involves controlling the presence of _B. cereus_ and other low-aw-resistant microorganisms.  
Conceptualization, M.T., D.Z., A.S. and D.K.-K.; methodology, K.N.-S., A.O. and A.L.; software, M.T.; validation, K.N.-S. and D.Z.; formal analysis, M.T. and A.S.; investigation, M.T. and D.Z.; resources, K.N.-S. and A.O.; data curation, M.T.; writing--original draft preparation, M.T.; writing--review and editing, D.Z., A.S. and K.N.-S.; visualization, M.T. and K.N.-S.; supervision, D.K.-K. and D.Z.; project administration, D.K.-K.; funding acquisition, D.K.-K. All authors have read and agreed to the published version of the manuscript.  
This research was funded by the Ministry of Agriculture and Rural Development (decision No. HOR.re.027.6.2018) from a subsidy for organic farming research entitled: Processing of plant and animal products with organic methods: Research on optimization and development of innovative processing solutions to increase the value of healthy organic products.  
The study was conducted following the Declaration of Helsinki (World Medical Association. Declaration of Helsinki: Ethical principles for medical research involving human subjects. JAMA J. Am. Med. Assoc. 2013, 310, 2191-2194).  
Not applicable.  
The authors declare no conflict of interest.