– The active substance is insulin aspart made by recombinant DNA technology in Saccharomyces cerevisiae (30% insulin aspart in a soluble fraction and 70% insulin aspart crystallised with protamine) – The other ingredients are glycerol, phenol, metacresol, zinc (as chloride), sodium chloride, disodium phosphate dihydrate, protamine sulphate, sodium hydroxide, hydrochloric acid and water for injections.