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

Explanation

### Step-by-Step Solution:

1. **Limited Availability**: Insulin obtained from the pancreas of slaughtered cows and pigs is produced in very small quantities. This limited availability can lead to shortages and difficulties in meeting the demand for insulin among diabetic patients.

2. **Side Effects**: Insulin derived from animal sources can lead to various side effects in humans. These may include allergic reactions or other adverse effects due to the differences in the structure of animal insulin compared to human insulin.

3. **Ethical Concerns**: The process of slaughtering animals for insulin raises ethical issues. Many people consider it unethical to harm or kill animals for the purpose of obtaining medical products, which can lead to public outcry and opposition to such practices.

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