This chapter contains sections titled: Introduction What is diabetes and how common is it? How much does dysglycemia increase cardiovascular risk? Explanation of the dysglycemia‐cardiovascular disease connection Does glucose lowering reduce cardiovascular outcomes? Conclusion References Introduction What is diabetes and how common is it? How much does dysglycemia increase cardiovascular risk? Explanation of the dysglycemia‐cardiovascular disease connection Does glucose lowering reduce cardiovascular outcomes? Conclusion References