The composition of lupin seeds was evaluated and the influence of fermentation on free amino acid (FAA)
profile was investigated.
The highest protein and carbohydrate contents were found in L. luteus var. ‘Vilciai’, the highest carbohydrate
contents e in L. angustifolius hybrid lines No. 1701 and No. 1800, and fat e in L. angustifolius
hybrid lines No. 1700, No. 1703 and No. 1734. The interaction between the fermentation method, the
bacterial strains used and lupin varieties had significant effects on the acidity parameters and lactic acid
bacteria count in fermented samples. There was a significant effect (P < 0.0001) between all interaction
groups on FAA profile and BAs formation in lupin seeds. Solid state fermentation showed a higher
effectiveness in comparison to submerged due to lower total BAs contents in most samples. Optimization
of the fermentation process (selection of the microorganisms, the lupin variety, and the fermentation
conditions) allows to improve safety of high-quality proteinaceous ingredients.