FIELD: preparative biochemistry. SUBSTANCE: invention relates to a method of preparing hyaluronic acid from cock crests. Raw is exsanguinated with ethyl alcohol in ratio 1:2, milled, an aqueous extraction is carried out and an aqueous fraction is separated. Then product is precipitated with ethyl alcohol in ratio 1:3, filtered and dried. On the stage of an aqueous extraction the raw is treated with collagenase enzyme preparation solution with content 0.035-0.40% to raw mass for 45-50 min at temperature 45-50 C and pH 6.8-7.0. EFFECT: increased yield, improved quality of end product. 4 dwg, 2 tbl
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