Since human recombinants have replaced the animal version in human therapeutics, the prefix of "rh" for "human recombinant" appears less and less in the literature
Human insulin (rhI) Humulin from Lilly and Novolin from Novo Nordisk among others; largely replaced bovine and porcine insulin for human therapy. Some prefer to continue using the animal-sourced preparations, as there is some evidence that synthetic insulin varieties are more likely to induce hypoglycemia unawareness. Remaining manufacturers of highly-purified animal-sourced insulin include the U.K.'s Wockhardt Ltd. (headquartered in India), Poland's Polfa Tarchomin S.A., Argentina's Laboratorios Beta S.A., and China's Wanbang Biopharma Co.
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