This section is split into eight topics, which you can work through sequentially.

The aim of this section is to help you understand what insulin and diabetes are and why they are important.

- T1: What is insulin?
- T2: What is type 1 diabetes?
- T3: Carlos: Introduction and initial diagnosis
- T4: What is type 2 diabetes?
- T5: Seema: Introduction and initial diagnosis
- T6: What are the other types of diabetes?
- T7: Summary
- T8: Test yourself

By the end of the section, you should be able to:

• Describe the main types of diabetes
• Describe what insulin does
• Explain why insulin is important in diabetes