The invention relates to demucilaged flax sprouts obtained from free mucilage sterilized and sprouted flax seed and a method for obtaining said flax sprouts. Also the invention relates to a food supplement comprising demucilaged flax sprouts and application of obtained mucilage in microbiology for laboratory or commercial purpose as a nutrient medium or component of nutrient medium for growing pectinolytic microorganisms or polysaccharide utilizing microorganisms.