Conditions reported in the literature for the extraction and degradation of each fraction (hemicellulose, cellulose, lignin, protein) of BSG's lignocellulosic matrix were reviewed alongside full fractionation examples for BSG or similar biomasses. This shows that many different conditions can be used depending on the biorefinery strategy and the desired form of each fraction (polymeric, oligomeric, monomeric). However, the conditions used for each step might have a significative impact on the subsequent conditions as it could alter the structural organisation of the remaining fractions. All available building blocks obtained from the extraction and degradation of BSG's fractions were described. Furthermore, their use as starting materials for useful monomer or polymer synthesis was discussed. Only a few examples of BSG's chemical valorisation for polymer applications have been presented so far,