The present invention provides a composition comprising 10-40 mass % of C8-30 linear alkanes, up to 20 mass % of C7-20 aromatic hydrocarbons, at least 90 mass % of which are monoaromatic, and no more than 1 mass % in total of oxygen-containing compounds; wherein the total amount of C8-30 alkanes in the composition is 50-95 mass %, and the total amount of C8-30 alkanes, C7-20 aromatic hydrocarbons and C8-30 cycloalkanes is at least 95 mass %; wherein the composition comprises 45-90 mass % in total of C8-30 cycloalkanes and C8-30 branched alkanes; and wherein the amounts are based on the mass of the composition. Also provided is a method of producing the composition comprising the step of hydroprocessing a biological feedstock using a catalyst and the step of fractionating the product of the hydroprocessing step.