How do you get Type 2 diabetes and what does it do to your body?
This week on Newsround we're talking lots about food and what it does to you.
It's because one in three kids in the UK is now overweight or obese.
In the worst cases and over time obesity can start to cause other health problems like Type 2 diabetes.
But that's very different from Type 1 diabetes, which lots of kids have.
Here our expert Dr Radha explains what happens inside our body to cause Type 2 diabetes and gives Ricky some tips on how to avoid it.