A composition comprising a non-anticoagulant sulfated polysaccharide, for use in enhancing blood coagulation in a subject, wherein the non-anticoagulant sulfated polysaccharide is a fucoidan selected from (a) and (b); wherein (a) is a fucoidan obtainable from Fucus vesiculosus having: (i) a sulphur content of 8.7 w% measurable by colorimetric titration according to Example 5, (ii) a sulphate content of 21.8 w% measurable by elemental analysis according to Example 5, (iii) a fucose content of 65% measurable by ion exchange chromatography according to Example 5, (iv) a C% fucose of 87% measurable by 13 C nuclear magnetic resonance spectroscopy according to Example 5, wherein C% fucose = (∫ methyl groups / (∫ anomeric region - ∫ carbonyl groups)) x 100%, (v) a C% alginate of ≤10% measurable by 13 C nuclear magnetic resonance spectroscopy according to Example 5, wherein C% alginate = (∫ carbonyl groups / ∫ anomeric region) x 100%, and (vi) a maximum peak molecular weight of 126.7 kilodaltons measureable by size exclusion chromatography according to Example 5; and wherein (b) is a fucoidan obtainable from Fucus vesiculosus having: (i) a sulphur content of 8.7 w% measurable by colorimetric titration according to Example 5, (ii) a sulphate content of 21.8 w% measurable by elemental analysis according to Example 5, (iii) a fucose content of 73% measurable by ion exchange chromatography according to Example 5, (iv) a C% fucose of 91% measurable by 13 C nuclear magnetic resonance spectroscopy according to Example 5, wherein C% fucose = (∫ methyl groups / (∫ anomeric region - ∫ carbonyl groups)) x 100%, (v) a C% alginate of ≤10% measurable by 13 C nuclear magnetic resonance spectroscopy according to Example 5, wherein C% alginale = (∫ carbonyl groups / ∫ anomeric region) x 100%, and (vi) a maximum peak molecular weight of 125 kilodaltons measureable by size exclusion chromatography according to Example 5. (i) a sulphur content of 8.7 w% measurable by colorimetric titration according to Example 5, (ii) a sulphate content of 21.8 w% measurable by elemental analysis according to Example 5, (iii) a fucose content of 65% measurable by ion exchange chromatography according to Example 5, (iv) a C% fucose of 87% measurable by 13 C nuclear magnetic resonance spectroscopy according to Example 5, wherein C% fucose = (∫ methyl groups / (∫ anomeric region - ∫ carbonyl groups)) x 100%, (v) a C% alginate of ≤10% measurable by 13 C nuclear magnetic resonance spectroscopy according to Example 5, wherein C% alginate = (∫ carbonyl groups / ∫ anomeric region) x 100%, and (vi) a maximum peak molecular weight of 126.7 kilodaltons measureable by size exclusion chromatography according to Example 5; (i) a sulphur content of 8.7 w% measurable by colorimetric titration according to Example 5, (ii) a sulphate content of 21.8 w% measurable by elemental analysis according to Example 5, (iii) a fucose content of 73% measurable by ion exchange chromatography according to Example 5, (iv) a C% fucose of 91% measurable by 13 C nuclear magnetic resonance spectroscopy according to Example 5, wherein C% fucose = (∫ methyl groups / (∫ anomeric region - ∫ carbonyl groups)) x 100%, (v) a C% alginate of ≤10% measurable by 13 C nuclear magnetic resonance spectroscopy according to Example 5, wherein C% alginale = (∫ carbonyl groups / ∫ anomeric region) x 100%, and (vi) a maximum peak molecular weight of 125 kilodaltons measureable by size exclusion chromatography according to Example 5.