Thus, lignin is a fraction more difficult to extract with multiple steps necessary. In addition to its difficult extraction or dissolution, the presence of its aromatic components showed microbial inhibition for the transformation of xylose to xylitol. Furthermore, BSG is not the optimal biomass to be selected if the fraction of interest is lignin, as barley shows a significantly lower lignan content compared to other cereals such as rye or wheat. Finally, the use of lignin or building blocks from lignin for polymer synthesis usually yield higher resistance materials thanks to its aromatic backbone but these materials show lower biodegradability profile compared to other biopolymers from carbohydrates for example.