The study of the effect of the modified atmosphere packaging on quality of the bread was done after replacing wheat flour with amaranth flour in replacement of wheat flour for 0, 5, 10 and 15% by weight. The bread was stored for one, three and seven days in the ATM, 100% N2 and 30% CO2. The study proved the 30% CO2 modified atmosphere to be the optimal storage condition. It allowed to preserve volume, water content and contributed at least to increase in hardness of bread, which with the addition of amaranth flour decreased. The colour of bread during storage was characterised by the increase in L* parameter and decrease in a* and b*. For the decreased storage time, the effect was opposite. The replacement by 5% of amaranth flour increased the polyphenol content and did not affect bread quality.
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