Introduction:
Recombinant therapeutics are medicinal products that are produced by using recombinant DNA technology. They are used to treat a wide range of diseases and disorders. These products are designed to mimic the actions of natural proteins in the body, and they are created by inserting the genetic material that codes for the protein into a host organism, such as bacteria or yeast. Recombinant therapeutics have revolutionized the treatment of many diseases and have become an essential part of modern medicine.

Answer:
As of 2021, more than 30 recombinant therapeutics have been approved for use in humans. These products are used to treat a variety of conditions including cancer, diabetes, autoimmune disorders, and rare genetic diseases.

Examples of approved recombinant therapeutics:
- Insulin: used to treat diabetes
- Erythropoietin: used to treat anemia
- Interferon: used to treat hepatitis C and some types of cancer
- Growth hormone: used to treat growth disorders in children
- Coagulation factors: used to treat hemophilia

Advantages of recombinant therapeutics:
- They are highly pure and free from impurities that can cause side effects
- They are produced in large quantities and can be easily scaled up to meet demand
- They are more consistent in their action and have a longer shelf life than products derived from natural sources
- They can be customized to meet specific patient needs

Conclusion:
Recombinant therapeutics have revolutionized the treatment of many diseases and have become an essential part of modern medicine. With more than 30 products approved for use in humans, they offer a safe and effective treatment option for many patients. As research and technology continue to advance, it is likely that new and innovative recombinant therapeutics will be developed to treat even more conditions in the future.