List the disadvantages of insulin obtained from the pancreas of slaughtered cows and pigs.

Explanation

(i) Insulin being a hormone is produced in very little amounts in the body. Hence, many animals need to be slaughtered for obtaining small quantities of insulin. This makes the cost of insulin very high. [Demand being many folds higher than supply). (ii) Slaughtering of animals is also not ethical. (iii) There is potential of immune response in humans against the administered insulin which is derived from animals. (iv) There is possibility of slaughtered animals being infested with some infectious microorganism which may contaminate insulin. (v) This type of insulin may cause allergic reactions.